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      11-29-2025, 09:32 PM   #1
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128i S65 Swap

I’m coming over from the E9X section to the 1 series forum. Got in a unfortunate accident in my E92 M3. I just picked up a 08 128i and I plan on transferring my E92 drivetrain into the 128i.

https://www.m3post.com/forums/showthread.php?t=2107425
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Last edited by Jbonly21; 11-29-2025 at 09:45 PM..
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      12-01-2025, 08:56 PM   #2
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Best way to do the swap. You're in as cheap as it gets.
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      12-13-2025, 04:17 PM   #3
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Started taking apart the E92.
Swapping My Whole E92 M3 Into A BMW 128i
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      12-17-2025, 06:44 AM   #4
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All the work you did to bring the M3 back to life and then rebuilding the engine was incredible. That accident looked crazy! Glad you're okay. Can't wait to see how this swap turns out, it should be awesome when it's done.
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      12-17-2025, 07:26 AM   #5
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Quote:
Originally Posted by spidertri View Post
All the work you did to bring the M3 back to life and then rebuilding the engine was incredible. That accident looked crazy! Glad you're okay. Can't wait to see how this swap turns out, it should be awesome when it's done.
Thanks appreciate it!
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      12-22-2025, 02:24 PM   #6
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Been busy!
Cheap BMW 128i Transformation ( Part 1)


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      12-25-2025, 08:15 PM   #7
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128i harness is out!
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      12-30-2025, 05:40 PM   #8
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E92 harness is in the 128i, as soon as the raining is over I can move to the bottom end!

BMW 128i E92 M3 S65 Swap (part 2)

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Last edited by Jbonly21; 12-30-2025 at 08:50 PM..
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      01-04-2026, 02:03 PM   #9
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Didn’t get to do much with all the rain we been getting. Rear subframe is out, decided to go with Turner Motorsport solid mounts and OE bushings.
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      01-07-2026, 09:21 PM   #10
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Subframe is done, went with Turner Motorsport solid bushings and the rest OEM.

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      01-11-2026, 07:40 PM   #11
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Why I am waiting on parts, I started to put the interior back together.

Is The E92 M3 Subframe Repairable?

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      01-16-2026, 09:16 AM   #12
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This thread is AWESOME. Just cruised through your old thread too, amazing job rebuilding the S65. What a rollercoaster. You work fast, man! I can't imagine all that you've learned from that previous project. Glad you're OK too! Can't wait to see how this one turns out.
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      01-20-2026, 09:18 PM   #13
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cerealwars thanks appreciate. Been busy, I managed to get the engine and subframe installed over the long weekend. I decided to go with the E92 dash.
BMW 128I S65 V8 Swap



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      01-29-2026, 11:33 AM   #14
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It was great to hear this thing fire up. Still need a couple more parts to have this thing rolling!
Trying To Start My S65 V8 1 Series Swap For The First Time


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      02-14-2026, 11:33 AM   #15
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Still needs a lot of work, but it’s great being able to hear this thing run.
Install BMW E92 M3 Dash Into My 128i


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      02-23-2026, 11:35 AM   #16
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Great progress so far, turns out my throttle actuator got damaged in the accident. Waiting on my rebuild kit.

First Drive In My Garage Build V8 BMW 128i
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      02-25-2026, 08:50 AM   #17
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I see a new project in my future. I always assumed an S65 swap was a total non-starter in CA, but seeing your build gives me hope. I know the general path is the BAR Referee for the 'Blue Tag' so it's recognized as an M3 for smog, but how much of a headache was the emissions integration? Did the Ref give you a hard time about the 128i fuel system or did you have to swap the entire M3 EVAP setup over too?
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      02-25-2026, 09:17 AM   #18
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Quote:
Originally Posted by kashikoi View Post
I see a new project in my future. I always assumed an S65 swap was a total non-starter in CA, but seeing your build gives me hope. I know the general path is the BAR Referee for the 'Blue Tag' so it's recognized as an M3 for smog, but how much of a headache was the emissions integration? Did the Ref give you a hard time about the 128i fuel system or did you have to swap the entire M3 EVAP setup over too?
I swapped the entire M3 evaporator system.
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      03-01-2026, 02:49 PM   #19
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There’s a couple of things I have to figure out, but I am glad that the car is drivable.
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      03-28-2026, 11:04 AM   #20
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Got an alignment done.

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      04-04-2026, 09:32 AM   #21
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Hey this is an amazing project and would be a real dream for me! Coming from a 128i I now own a Z4M and an E90 M3. After driving many modern ///M platforms I desire more for what you’re building here. Either that or an E46 M3.

Could you summarize all of your accomplishments? How driveable is the car now? Any plans to sell your services as a conversion expert to the enthusiast community?
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      04-04-2026, 07:09 PM   #22
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It hits different, the sound and the way it feels is completely different than any modern BMW. I own a F80 and it’s night and day different between the 2. It is a goal of my to doing custom work in the near future for people. I just need more space, not a public shop more like a invite only.
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