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5 Series E39 LS swap
A typical 5 Series E39 LS swap runs about $10,000–$15,000 in parts ($6,000 on a budget), and the big decision is where the engine sits: there's no production kit, and the I6 and V8 subframes take different mounts.
Last updated
BMW · 1995–2003Kits listed by vendorsE39
We don't have a complete sourced parts list for this vehicle yet. Below are our notes for it, the parts vendors list for it, and the guides that apply to every LS swap.
Parts and steps for the 5 Series E39
Every part option we know for each stage of the swap. Open a step, start with our pick, and check all the options. Plan your exact combination →
Before you buy
Parts we know for this vehicle: 43 options across 10 of 10 categories.
What it costs: budget build about $6,000; typical build $10,000–$15,000 (parts, not labor, prices as of 2026-10-01).
Budget: used 5.3L LM7 + Jesus Freak mounts/headers + GM Performance pan ($145 Jegs) or Autokraft/Champ + used F-body drive + T56 + simplified 3/4-wire harness + stock BMW pump + M5 radiator + Grand Am fans + modified stock shaft (~$100 Denny's parts). Typical:
Tags: Verified on our parts list or confirmed on the maker's page for this vehicle · Listed the vendor's catalog names this vehicle · Community from owners' builds and small sellers.
Beta We're still fixing fitment as owners report it. Double-check parts before you buy. See what's new →
2Mounts, crossmember & oil panSet where the engine sits, then pick a pan that clears · 4 parts
DecideWhere the engine sits (kit mounts or custom).
CheckMeasure from the pan rail to the crossmember and to the ground before you choose an oil pan.
Mounts & swap kits
5 optionsWhy you need it: The mounts set where the engine sits, and that decides oil pan, header and driveline fit. No production kit. The I6 (525i/528i/530i) and V8 (540i) subframes take different mounts, and the F-body alternator can hit the driver mount, so fit the accessories before you finish it. More: engine mounts and swap kits.
Options3 of 5
Bmwman528e 540i LS swap mountsAnother small seller still makes mounts for 540i (V8) swaps. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Bmwman528e
DIY / custom fabricated Custom E39 LS motor mountsInstall the F-body accessories BEFORE finalizing the driver-side mount — the alternator can hit it. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from DIY / custom fabricated
Jesus Freak (Josh) E39 I6 LS swap engine mounts — 1/4 in mild steel, TIG weldedFits 6-cylinder E39s (525i/528i/530i subframe) only; works with any LS engine, 4L80E, TR6060 or T56. Contact via jfreak2006@hotmail.com. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Jesus Freak (Josh)
Compare 5 mount & swap kit options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| Bmwman528e 540i LS swap mounts Community | — | Another small seller still makes mounts for 540i (V8) swaps. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Bmwman528e | Small batch | |
| DIY / custom fabricated Custom E39 LS motor mounts Community | — | Install the F-body accessories BEFORE finalizing the driver-side mount — the alternator can hit it. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from DIY / custom fabricated | DIY | |
| Jesus Freak (Josh) E39 I6 LS swap engine mounts — 1/4 in mild steel, TIG welded Community | — | Fits 6-cylinder E39s (525i/528i/530i subframe) only; works with any LS engine, 4L80E, TR6060 or T56. Contact via jfreak2006@hotmail.com. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Jesus Freak (Josh) | Small batch | |
| Levels Performance (caution) E39 LS swap kit (availability uncertain) Community | — | Caution: small shop, no response to emails/calls and bad reviews for unresponsiveness as of 2022. Verify before sending money. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Levels Performance (caution) | Discontinued | |
| Ls2lilo 540i/740i (V8) LS engine/trans mounts Community | — | For V8-chassis E39s; engine and trans mounts in stock at times. Contact via e39swapkit@gmail.com. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Ls2lilo | Small batch |
Oil pan
4 options · $145Why you need it: The pan has to clear the crossmember, the ground and, on a 4x4, the front differential. On an I6-subframe E39 the cheap GM swap pan hangs about 1.5 in below the subframe because of the steering rack; the Autokraft/Champ or Mast pan clears it. More: oil pan guide.
Options3 of 4
Autokraft / Champ Pans Autokraft/Champ LS swap oil panThe common pan for I6-subframe E39 swaps; recommended by Jesus Freak with his mounts. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Autokraft / Champ Pans
GM OEM GTO LS pan (modified)Older E39 route — needed modification; largely superseded by the $145 GM Performance pan and the Autokraft/Champ pan. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
Mast Motorsports Mast LS oil pan (aluminum, stressed-member style)Confirmed fit on E39 I6 subframe: 1/4 in+ clearance at the subframe cross brace, ~1/8 in at the steering-rack ridges; rack hard line may need a tweak. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Mast Motorsports
Compare 4 oil pan options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| Autokraft / Champ Pans Autokraft/Champ LS swap oil pan Community | — | The common pan for I6-subframe E39 swaps; recommended by Jesus Freak with his mounts. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Autokraft / Champ Pans | In production | |
| GM OEM GTO LS pan (modified) Community | — | Older E39 route — needed modification; largely superseded by the $145 GM Performance pan and the Autokraft/Champ pan. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | DIY | |
| Mast Motorsports Mast LS oil pan (aluminum, stressed-member style) Community | — | Confirmed fit on E39 I6 subframe: 1/4 in+ clearance at the subframe cross brace, ~1/8 in at the steering-rack ridges; rack hard line may need a tweak. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Mast Motorsports | In production | |
| GM Performance (via JEGS) GM Performance LS swap oil pan (JEGS, ~$145) Community | — | $145 2026-10-01 | Fits 540/V8-subframe E39 swaps with no modification; on I6-subframe cars it hangs ~1.5 in below the subframe due to the steering rack. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM Performance (via JEGS) | In production |
Steering
3 optionsWhy you need it: The engine and headers have to clear the steering shaft and box, and some swaps need a new shaft or box to make room. A 540i has a recirculating-ball box; using I6 steering there means swapping the whole front subframe and suspension. More: steering shaft and box clearance.
Options3 options
BMW OEM E39 I6 rack-and-pinion steering (stock)Start with a 525i/528i/530i chassis — rack-and-pinion is lighter and gives better header room than the 540i recirc-ball setup. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from BMW OEM
BMW OEM (I6 swap) I6 front suspension + subframe + steering swap into a 540iTo LS-swap a 540i with I6-based parts you must remove the entire front suspension, subframe and recirc-ball steering and replace with 528i parts. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from BMW OEM (I6 swap)
DIY / hydraulic shop Custom power-steering lines: GM pump to BMW rackStandard practice on E39 LS swaps; have lines made at a hydraulic shop. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from DIY / hydraulic shop
Compare 3 steering options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| BMW OEM E39 I6 rack-and-pinion steering (stock) Community | — | Start with a 525i/528i/530i chassis — rack-and-pinion is lighter and gives better header room than the 540i recirc-ball setup. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from BMW OEM | Used only | |
| BMW OEM (I6 swap) I6 front suspension + subframe + steering swap into a 540i Community | — | To LS-swap a 540i with I6-based parts you must remove the entire front suspension, subframe and recirc-ball steering and replace with 528i parts. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from BMW OEM (I6 swap) | Used only | |
| DIY / hydraulic shop Custom power-steering lines: GM pump to BMW rack Community | — | Standard practice on E39 LS swaps; have lines made at a hydraulic shop. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from DIY / hydraulic shop | DIY |
Brakes & booster
2 optionsWhy you need it: A big cam can leave too little vacuum for the booster, and some swaps leave no room for one. The stock E39 booster stays; there's no known clearance problem with it. More: vacuum booster or hydroboost?
Options2 options
BMW OEM Stock E39 brake booster (retained)No documented LS clearance issue with the E39 booster — builders keep it; replace if it has a pinhole leak. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from BMW OEM
Chase Bays Brake booster eliminator (single/dual piston)Generic BMW booster-delete option for engine-bay room; not E39-verified. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Chase Bays
Compare 2 brake & booster options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| BMW OEM Stock E39 brake booster (retained) Community | — | No documented LS clearance issue with the E39 booster — builders keep it; replace if it has a pinhole leak. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from BMW OEM | In production | |
| Chase Bays Brake booster eliminator (single/dual piston) Community | — | Generic BMW booster-delete option for engine-bay room; not E39-verified. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Chase Bays | In production |
More notes for step 2Apply to the whole step, not one part
Ready for the next step when you've picked where the engine sits and an oil pan that clears it.
Next: transmission & driveline →3Transmission & drivelinePick the transmission and how it shifts, then the parts behind it · 3 parts
DecideWhich transmission handles your torque and how it will be controlled, then plan the crossmember, driveshaft length and flexplate or bellhousing to match.
Transmission adapter & clutch
3 optionsWhy you need it: An LS needs its own bellhousing or adapter and the right flexplate or flywheel, and an electronic transmission needs a computer to shift it. A GM T56 or TR6060 bolts on; an F-body Magnum T56 may need an extended shifter to reach the E39 shifter hole, and a 4L80E also fits. More: transmission guide.
Options3 options
Collins / PMC CD009-to-LS or LS-to-BMW ZF/Getrag adapter kitsGeneric LS adapter options; not E39-verified. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Collins / PMC
GM OEM Stock GM T56 / TR6060 with LS bellhousing (no adapter needed)Most common E39 LS manual; F-body Magnum T56 may need an extended shifter to hit the factory hole. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
GM OEM 4L80E automaticUsed in the Project 560i E39 LSx build; Jesus Freak mounts work with it. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
Compare 3 transmission adapter & clutch options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| Collins / PMC CD009-to-LS or LS-to-BMW ZF/Getrag adapter kits Community | — | Generic LS adapter options; not E39-verified. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Collins / PMC | In production | |
| GM OEM Stock GM T56 / TR6060 with LS bellhousing (no adapter needed) Community | — | Most common E39 LS manual; F-body Magnum T56 may need an extended shifter to hit the factory hole. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | Used only | |
| GM OEM 4L80E automatic Community | — | Used in the Project 560i E39 LSx build; Jesus Freak mounts work with it. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | Used only |
Crossmember
2 optionsWhy you need it: The transmission mount usually moves, and the crossmember sets the driveline angle. There's no bolt-in E39 T56 crossmember: most are templated in cardboard and built in steel. More: getting driveline angles right.
Options2 options
DIY / custom fabricated Custom T56 transmission crossmember (cardboard template to steel)Mocked in cardboard, transferred to steel — standard E39 LS approach. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from DIY / custom fabricated
Ls2lilo 540i/740i transmission mountsSold with the V8-chassis engine mounts; contact via e39swapkit@gmail.com. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Ls2lilo
Compare 2 crossmember options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| DIY / custom fabricated Custom T56 transmission crossmember (cardboard template to steel) Community | — | Mocked in cardboard, transferred to steel — standard E39 LS approach. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from DIY / custom fabricated | DIY | |
| Ls2lilo 540i/740i transmission mounts Community | — | Sold with the V8-chassis engine mounts; contact via e39swapkit@gmail.com. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Ls2lilo | Small batch |
Driveshaft
3 options · $100Why you need it: A different transmission is almost always a different length, so plan on a custom-length driveshaft. Budget route: keep the 188 mm diff and have the factory shaft converted to a slip yoke; the M5 diff is the limited-slip upgrade. More: driveshaft length and angles.
Options3 options
BMW OEM E39 M5 differential + axles + driveshaft upgradeThe LSD upgrade path — M5 diff makes an LSD much easier to achieve once power climbs. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from BMW OEM
DIY / local shop Modified factory driveshaft with slip yoke for the transRun the stock 188mm diff and have the factory shaft modified with a slip yoke — the budget E39 answer. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
~$100 in parts (Denny's weld yoke, u-joint, slip yoke)Direct from DIY / local shop
Denny's Driveshafts Weld yoke + u-joint + slip yoke for factory-shaft conversionParts to convert the stock E39 shaft to a slip-yoke trans connection. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
~$100Direct from Denny's Driveshafts
Compare 3 driveshaft options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| BMW OEM E39 M5 differential + axles + driveshaft upgrade Community | — | The LSD upgrade path — M5 diff makes an LSD much easier to achieve once power climbs. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from BMW OEM | Used only | |
| DIY / local shop Modified factory driveshaft with slip yoke for the trans Community | — | ~$100 in parts (Denny's weld yoke, u-joint, slip yoke) 2026-10-01 | Run the stock 188mm diff and have the factory shaft modified with a slip yoke — the budget E39 answer. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from DIY / local shop | DIY |
| Denny's Driveshafts Weld yoke + u-joint + slip yoke for factory-shaft conversion Community | — | ~$100 2026-10-01 | Parts to convert the stock E39 shaft to a slip-yoke trans connection. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Denny's Driveshafts | In production |
More notes for step 3Apply to the whole step, not one part
Ready for the next step when you've picked the transmission and how it's controlled, and know the crossmember, driveshaft and flexplate or bellhousing it needs.
Next: accessories & cooling →4Accessories & coolingOne accessory spacing, then cooling and A/C · 3 parts
DecideOne accessory drive spacing, and match the balancer, water pump and brackets to it.
CheckCheck fan, hose and hood clearance.
Accessory drive
4 options · $400Why you need it: The balancer, water pump, brackets and pulleys must all be one spacing, or the belt won't line up. More: accessory drive guide.
Options3 of 4
GM OEM 1998–02 F-body accessory driveCommon E39 LS front drive; install it before finalizing the driver-side motor mount — the alternator can interfere. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
GM OEM CTS-V FEAD (front engine accessory drive)Used on an E39 M5 LS swap; Denso A/C compressor needs custom fittings (different from F-body/Corvette compressors). Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
GM OEM GM power steering pump + custom lines to BMW rackStandard E39 LS power-steering answer: GM pump with custom lines to the BMW rack. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
Compare 4 accessory drive options
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| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| GM OEM 1998–02 F-body accessory drive Community | — | Common E39 LS front drive; install it before finalizing the driver-side motor mount — the alternator can interfere. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | Used only | |
| GM OEM CTS-V FEAD (front engine accessory drive) Community | — | Used on an E39 M5 LS swap; Denso A/C compressor needs custom fittings (different from F-body/Corvette compressors). Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | Used only | |
| GM OEM GM power steering pump + custom lines to BMW rack Community | — | Standard E39 LS power-steering answer: GM pump with custom lines to the BMW rack. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | Used only | |
| ICT Billet ICT Billet 551796-2 LS BMW swap alternator + power steering bracket kit Listed | 551796-2 | 400.00 2026-10-01 | BMW E46 LS swap (323/325/328/330) with 1998-2002 Camaro LS1 / 2004-06 GTO harmonic balancer spacing; same LS-into-BMW accessory concept Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Check price & fitment | In production |
Cooling
3 optionsWhy you need it: LS water pumps put both hoses on the passenger side and the engine needs a steam line, so the radiator needs LS-style ports or an adapter. E39 builds run the M5 radiator with dual Grand Am fans, or a C5 Corvette radiator with F-body fans. More: radiator, fans and steam line.
Options3 options
Aftermarket / eBay 3-row aluminum E39-fit radiatorGeneric LS-swap cooling option; confirm inlet/outlet orientation matches the LS hose routing before buying. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Aftermarket / eBay
BMW OEM E39 M5 radiator + dual Pontiac Grand Am fansUsed on an E39 M5 LS swap; same fan setup ran 3 years on a 530i daily driver. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from BMW OEM
GM OEM C5 Corvette radiator + F-body fansPrevious cooling setup on an E39 M5 LS swap before switching to the M5 radiator. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
Compare 3 cooling options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| Aftermarket / eBay 3-row aluminum E39-fit radiator Community | — | Generic LS-swap cooling option; confirm inlet/outlet orientation matches the LS hose routing before buying. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Aftermarket / eBay | Used only | |
| BMW OEM E39 M5 radiator + dual Pontiac Grand Am fans Community | — | Used on an E39 M5 LS swap; same fan setup ran 3 years on a 530i daily driver. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from BMW OEM | Used only | |
| GM OEM C5 Corvette radiator + F-body fans Community | — | Previous cooling setup on an E39 M5 LS swap before switching to the M5 radiator. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | Used only |
A/C
2 optionsWhy you need it: Where the compressor mounts (high or low) can decide frame, fender and header clearance, so pick it before you buy brackets. E39 A/C joins a GM compressor to the BMW condenser and drier with custom lines; a CTS-V drive's Denso compressor needs machined fittings. More: accessory drive guide.
Options2 options
DIY / machined Custom CNC A/C fittings: CTS-V Denso compressor to BMW steel linesFor CTS-V FEAD swaps — Denso compressor fittings differ from F-body/Corvette; have fittings machined and TIG-weld BMW steel lines to them. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from DIY / machined
GM OEM + BMW OEM GM A/C compressor + BMW drier/condenser + custom linesThe proven E39 LS A/C recipe — custom lines join the GM compressor to the BMW condenser/drier. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM + BMW OEM
Compare 2 A/C options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| DIY / machined Custom CNC A/C fittings: CTS-V Denso compressor to BMW steel lines Community | — | For CTS-V FEAD swaps — Denso compressor fittings differ from F-body/Corvette; have fittings machined and TIG-weld BMW steel lines to them. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from DIY / machined | DIY | |
| GM OEM + BMW OEM GM A/C compressor + BMW drier/condenser + custom lines Community | — | The proven E39 LS A/C recipe — custom lines join the GM compressor to the BMW condenser/drier. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM + BMW OEM | Used only |
More notes for step 4Apply to the whole step, not one part
More: Accessory drive guide · Cooling guide
Ready for the next step when you've picked one accessory spacing, with the balancer, water pump and brackets to match.
Next: exhaust →5ExhaustHeaders or manifolds that clear where the engine sits · 1 part
DecideHeaders or manifolds that clear the steering, frame and starter where your mounts put the engine.
Headers & exhaust
3 optionsWhy you need it: Headers are shaped around one chassis's frame, steering and floor, so they have to be made for your vehicle and engine position. The I6 rack sits further back and lower than the 540i's steering box, which helps; otherwise headers are custom or kit-matched. More: headers and exhaust by chassis.
Options3 options
DIY / custom fabricated Custom E39 LS headersCommon path for E39 — mock up tubes around the I6 rack, which puts the obstruction further back and down. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from DIY / custom fabricated
GM OEM (experimental) C5/C6 Corvette or CTS-V OE iron LS exhaust manifoldsExperimental — 540i recirculating-ball steering may offer more exhaust clearance than rack-and-pinion; unconfirmed fit. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM (experimental)
Jesus Freak (Josh) E39 I6 LS swap headers — 3/8 in flanges, 1-3/4 in primaries, 2-1/2 in collector with V-bandFor 6-cylinder E39s; fully purged TIG welded; 1-7/8 in primaries in development. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Jesus Freak (Josh)
Compare 3 header & exhaust options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| DIY / custom fabricated Custom E39 LS headers Community | — | Common path for E39 — mock up tubes around the I6 rack, which puts the obstruction further back and down. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from DIY / custom fabricated | DIY | |
| GM OEM (experimental) C5/C6 Corvette or CTS-V OE iron LS exhaust manifolds Community | — | Experimental — 540i recirculating-ball steering may offer more exhaust clearance than rack-and-pinion; unconfirmed fit. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM (experimental) | Used only | |
| Jesus Freak (Josh) E39 I6 LS swap headers — 3/8 in flanges, 1-3/4 in primaries, 2-1/2 in collector with V-band Community | — | For 6-cylinder E39s; fully purged TIG welded; 1-7/8 in primaries in development. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Jesus Freak (Josh) | Small batch |
More notes for step 5Apply to the whole step, not one part
More: Headers & exhaust guide
Ready for the next step when you've picked headers or manifolds that clear where your mounts put the engine.
Next: fuel system →6Fuel systemPump, lines and pressure for the LS · 1 part
DecideReturn or returnless, and a pump and injectors sized for your power and fuel (gas or E85).
Fuel system
4 optionsWhy you need it: An LS runs about 58 psi of fuel pressure; a carbureted system runs 5–7 psi. The stock E39 pump runs an LS; a Walbro 255 drops into the BMW housing, but the C5 filter/regulator is too small for a Walbro 450. More: fuel system & E85 guide.
Options3 of 4
BMW OEM E39 M5 OEM fuel pumpUsed in a 2003 M5 LSx swap; reported adequate for the LS. · for 2003–2003 only Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from BMW OEM
BMW OEM Stock E39 fuel pumpReported to work fine in an LS1-swapped BMW; check pressure at high RPM under load. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from BMW OEM
GM OEM C5 Corvette filter/regulator (58 psi) — caution with big pumps10299146 · Fine for Walbro 255-level pumps; too small for a Walbro 450 — an E39 turbo builder had to switch to a new regulator. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from GM OEM
Compare 4 fuel system options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| BMW OEM E39 M5 OEM fuel pump Community | — | Used in a 2003 M5 LSx swap; reported adequate for the LS. for 2003–2003 only Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from BMW OEM | Used only | |
| BMW OEM Stock E39 fuel pump Community | — | Reported to work fine in an LS1-swapped BMW; check pressure at high RPM under load. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from BMW OEM | Used only | |
| GM OEM C5 Corvette filter/regulator (58 psi) — caution with big pumps Community | 10299146 | Fine for Walbro 255-level pumps; too small for a Walbro 450 — an E39 turbo builder had to switch to a new regulator. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from GM OEM | In production | |
| Walbro 255 LPH in-tank pump (GSS340 / F20000169) Community | GSS340 | Direct replacement in BMW pump housings; supports up to ~550 hp. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Walbro | In production |
More notes for step 6Apply to the whole step, not one part
More: Fuel & E85 guide
Ready for the next step when you've decided return or returnless, and sized the pump and injectors for your power and fuel.
Next: wiring, computer & tune →7Wiring, computer & tuneHarness, computer and tune matched to the engine · 1 part
DecideA harness and computer that match your engine's crank signal (24x or 58x) and throttle (cable or drive-by-wire), and plan the tune, including VATS.
Harness & computer
5 options · $1,369–$1,549Why you need it: The computer and harness have to match the engine's crank signal (24x or 58x) and throttle (cable or drive-by-wire), and the tune has to turn VATS off. There's no true plug-and-play E39 harness; most are simplified standalones, so the cluster, ABS and coding are still on you. More: 24x vs 58x, and which harness.
Options3 of 5
Wiring Specialties BMW E39 LS1 Swap Wiring Harness Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
$1,369Direct from Wiring Specialties
Wiring Specialties BMW E39 LS3 Swap Wiring Harness Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
$1,549Direct from Wiring Specialties
Aftermarket / universal Simplified 3/4-wire LS standalone harnessNo known direct plug-and-play harness for the E39; most are simplified 3/4-wire hookups — cluster, ABS and coding still on you. Unconfirmed Confirm this
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why.
Direct from Aftermarket / universal
Compare 5 harness & computer options
| Maker / product | Part # | Price | Fits / notes | Where | Status |
|---|---|---|---|---|---|
| Wiring Specialties BMW E39 LS1 Swap Wiring Harness Listed | — | $1,369 2026-09-29 | Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Wiring Specialties | |
| Wiring Specialties BMW E39 LS3 Swap Wiring Harness Listed | — | $1,549 2026-09-29 | Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Wiring Specialties | |
| Aftermarket / universal Simplified 3/4-wire LS standalone harness Community | — | No known direct plug-and-play harness for the E39; most are simplified 3/4-wire hookups — cluster, ABS and coding still on you. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from Aftermarket / universal | In production | |
| DIY E39 LS wiring guide: T56 VSS, reverse lockout, Ford reverse-light switch Community | — | T56: VSS C2 #20/#21, speed-controlled reverse-lockout controller, Ford reverse-light switch (plug faces down for tunnel clearance); AC request C2 #17. Unconfirmed Confirm this We have not confirmed this part on this vehicle yet. If you installed it, tell us what you used and why. | Direct from DIY | DIY | |
| Wiring Specialties BMW LS swap plug-and-play wiring harness (E39 listed) Listed | — | E39 – 5 Series is listed in their BMW LS swap harness lineup. | Direct from Wiring Specialties | In production |
New Already have a tune in it? Send us the file for a free Tune Report: what to fix first, in plain English, within 1 business day. See what you get →
More notes for step 7Apply to the whole step, not one part
More: ECU comparison · Tuning
That's the last step. Put your picks together in the planner.
Plan your exact combination →E39 swap notes
- Sikky's Stage 3 E39 wiring packages list 520i/523i/525i/528i/530i/535i six-cylinder models and also 540i/M5 eight-cylinder models as selectable chassis variants.
- Sikky's standalone E39 LS motor mounts are machined 6061-T6 billet aluminum with captured urethane bushings and hardware, and they fit only OEM inline-six chassis/subframes - not the 540i or M5.
- The Sikky E39 pan is designed to use the LS3 dipstick and tube (OEM GM tube 12625031, stick 12669528) and requires the OEM F-body Camaro pickup tube part 12558251.
- With the Sikky E39 pan, leave at least a 3/8-inch gap between the bottom of the pickup tube and the pan.
- Sikky's E39 crossmember and Stage packages support T56, T56 Magnum, CD009 and TR6060; a T56 Magnum XL has also been documented in an E39 M5 build using an Anchor #2369 transmission mount.
- FABbot also lists an older-generation clutch hydraulic feed line kit for 1965-1997 BMW applications, which the vendor references for E28, E34 and E39 LS swaps.
- The E39 I6 front subframe and rack-and-pinion steering is the preferred starting point; fitting a 540i/M5 V8 car requires subframe conversion, and Sikky's standalone mounts do not fit 540/M5 chassis.
- Sikky's E39 mid-sump pan is designed to fit around the front subframe of the BMW E39 5 Series chassis when using a Sikky mount kit.
Every LS swap also needs
An oil pan that clears
Compare GM LS pans by sump position and depth.
Accessory drive spacing
F-body, car, truck and Corvette offsets.
Fuel system sizing
Injector and pump sizing for your power goal.
A harness, computer and tune
VATS delete, 24x vs 58x, drive-by-wire, harness makers.
A transmission
4L60E to 8HP70 behind an LS.