N55/B58 swap into N20 Touring.

hon2bmw · 07-25-2020, 11:19 PM

Before we begin, I have an F31 Touring, which was only offered in the US with the N20/N26, B48 or N47.

So no, I can't just go "buy a 335/340 and save myself the trouble"

I have an N20 328i with manufacture date 05/16

I'm going to be hunting for a full salvage donor 335/340i xdrive sedan for the swap, but I'm trying to limit the man hours going into the work.

My biggest question is if the B58 xDrive transmission and motor sub-harnesses will plug into the chassis harness without modification? I'd prefer the B58 over the N55 but not absolutely married to either. I would however like to avoid ripping out the interior and dash board to swap over the chassis harness, nor do I like modifying the harness, so this is probably the most essential part of whether this move forward or not.

Just seeing if anyone has experience with this, I've been going through realoem looking at part numbers but haven't been able to get any sort of definitive answer.

rjd_F30 · 07-26-2020, 09:38 AM

I can't tell you for sure, but there are a couple of guys on IG who have S55 swapped an F31. I would reach out to them as a resource, they'll probably be ablee to provide some insight into the process, even if they worked with an S55 rather than a B58.

cedaj · 07-26-2020, 09:51 AM

Quote:

Originally Posted by rjd_F30

I can't tell you for sure, but there are a couple of guys on IG who have S55 swapped an F31. I would reach out to them as a resource, they'll probably be ablee to provide some insight into the process, even if they worked with an S55 rather than a B58.

I think how those guys do it is buy a donor car and just transfer everything over

eleven11 · 07-27-2020, 07:39 PM

This thread was never updated, but was perhaps updated on social media elsewhere:

https://f30.bimmerpost.com/forums/sh....php?t=1548060

I suspect they can answer your questions.

hon2bmw · 07-29-2020, 02:39 PM

Quote:

Originally Posted by eleven11

This thread was never updated, but was perhaps updated on social media elsewhere:

https://f30.bimmerpost.com/forums/sh....php?t=1548060

I suspect they can answer your questions.

I believe I saw this completed vehicle at Bimmerfest west in 2019. Its honestly what made me want to do this.

Cabra · 01-20-2023, 02:27 PM

so has anyone successfully swapped a B58 into an F30 which was previously an N20 ?

JDAURIA · 02-10-2023, 12:56 PM

Quote:

Originally Posted by Cabra

so has anyone successfully swapped a B58 into an F30 which was previously an N20 ?

It's been done before. There is a guy on IG with an F31 who just sourced 440i B58 motor and will be doing the swap in next few months.

Cabra · 02-11-2023, 11:26 PM

Quote:

Originally Posted by JDAURIA

It's been done before. There is a guy on IG with an F31 who just sourced 440i B58 motor and will be doing the swap in next few months.

Do you know the IG name ?

JDAURIA · 02-13-2023, 06:29 AM

230k_rs36

rlesko · 07-20-2023, 01:05 PM

Quote:

Originally Posted by JDAURIA

230k_rs36

I couldn't find anyone with this handle on instagram, can you confirm the name?

JDAURIA · 07-20-2023, 01:51 PM

230k_rsq56 but he doesnt post much on the actual car.

07-25-2020, 11:19 PM	#1
hon2bmw Private 362 Rep 90 Posts Drives: 2016 F31 Msport/Track handling Join Date: May 2018 Location: AZ iTrader: (0) Garage List 2018 AMG E63S Estate [0.00] 2016 F31 328i Xdriv ... [0.00]	N55/B58 swap into N20 Touring. Before we begin, I have an F31 Touring, which was only offered in the US with the N20/N26, B48 or N47. So no, I can't just go "buy a 335/340 and save myself the trouble" I have an N20 328i with manufacture date 05/16 I'm going to be hunting for a full salvage donor 335/340i xdrive sedan for the swap, but I'm trying to limit the man hours going into the work. My biggest question is if the B58 xDrive transmission and motor sub-harnesses will plug into the chassis harness without modification? I'd prefer the B58 over the N55 but not absolutely married to either. I would however like to avoid ripping out the interior and dash board to swap over the chassis harness, nor do I like modifying the harness, so this is probably the most essential part of whether this move forward or not. Just seeing if anyone has experience with this, I've been going through realoem looking at part numbers but haven't been able to get any sort of definitive answer. __________________ 2018 S213 AMG E63S Estate: Diamond White - Money-pit/Garage Queen 2004 CL9 Acura TSX 6-speed: Satin Silver - Peak JDM 2018 BEV2 Chevy Bolt: Nightfall Gray - Daily driver Last edited by hon2bmw; 07-25-2020 at 11:32 PM..
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07-26-2020, 09:38 AM	#2
rjd_F30 Brigadier General 2000 Rep 3,680 Posts Drives: 2013 335i 6MT Join Date: Jun 2017 Location: New Jersey iTrader: (0)	I can't tell you for sure, but there are a couple of guys on IG who have S55 swapped an F31. I would reach out to them as a resource, they'll probably be ablee to provide some insight into the process, even if they worked with an S55 rather than a B58. __________________ Instagram: rjd_f30 \| Current: EBII 2013 335i 6MT RWD & Sprint Blue 2008 Audi RS4 \| Retired: 2013 328i, 2000 XTerra, 2022 Civic Si \|
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07-27-2020, 07:39 PM	#4
eleven11 Major 372 Rep 1,425 Posts Drives: -F85 X5M- Join Date: Mar 2007 Location: Derby City iTrader: (0)	This thread was never updated, but was perhaps updated on social media elsewhere: https://f30.bimmerpost.com/forums/sh....php?t=1548060 I suspect they can answer your questions. __________________ 2017 X5M - Current 2017 F31 Wagon - Current 2014 M5 ZCP - Retired 2011 135i Coupe - Retired 2007 335i Sedan - Retired
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01-20-2023, 02:27 PM	#6
Cabra Second Lieutenant 79 Rep 214 Posts Drives: TBD Join Date: Jul 2017 Location: Chicago iTrader: (0)	so has anyone successfully swapped a B58 into an F30 which was previously an N20 ?
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02-13-2023, 06:29 AM	#9
JDAURIA Lieutenant Colonel 725 Rep 1,716 Posts Drives: F31 MSport Join Date: Jun 2008 Location: West Palm Beach, FL iTrader: (6) Garage List 2005 BMW [0.00] 2016 BMW [0.00]	230k_rs36 __________________ 2016 F31 328iX \| Alpine White \| Black \| ///MSport \| iND \| Eventuri \| AC Schnitzer \| MPerformance \| 513M \| Michelin PS4 \| 2005 \| 330CiC \| Sparkling Graphite \| Black \| 6MT \| ZHP Purchase your W///AGON Stickers Here: https://f30.bimmerpost.com/forums/sh....php?t=1930190
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07-20-2023, 01:51 PM	#11
JDAURIA Lieutenant Colonel 725 Rep 1,716 Posts Drives: F31 MSport Join Date: Jun 2008 Location: West Palm Beach, FL iTrader: (6) Garage List 2005 BMW [0.00] 2016 BMW [0.00]	230k_rsq56 but he doesnt post much on the actual car. __________________ 2016 F31 328iX \| Alpine White \| Black \| ///MSport \| iND \| Eventuri \| AC Schnitzer \| MPerformance \| 513M \| Michelin PS4 \| 2005 \| 330CiC \| Sparkling Graphite \| Black \| 6MT \| ZHP Purchase your W///AGON Stickers Here: https://f30.bimmerpost.com/forums/sh....php?t=1930190
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