My E46 Sedan Transformed with M Upgrades: Rear End Swap & F8X Brakes!

Eric
Eric
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Published 2024-06-19
In this follow-up video, I tackle the issues with fitting M4 brakes and rotors on my E46 1999 BMW 328i. This video dives deep into the process and solutions for upgrading the braking system, including a complete rear end swap with an M3 subframe, sway bar, differential, control arms, and end links. If you're interested in E46 M3 upgrades, custom brake installations, and DIY car modifications, this video is for you.

First, I swapped out the old small rear subframe for a complete M3 subframe, including the sway bar, differential, control arms, end links, and more. Although I made every bolt gold, I didn't capture that on camera. During the subframe swap, I checked for cracks or rust in the floor—luckily, it was all clear!

Next, I installed 5mm spacers on the wheel hub, creating enough space for the M4 caliper mounting points to fit perfectly with the factory mounting points and rotors. After all that work, the M4 brakes finally fit on my E46 328i, but I wasn't satisfied just yet.

To finish the job, I completely redid the calipers in a striking red color, similar to newer BMW models, and added a decal and clear coat for a professional finish. The video ends after I install the calipers back on, remove the car from the jack stands, and lower it to ride height—leaving you on a cliffhanger!

If you're passionate about E46 mods, love DIY car projects, or just enjoy watching detailed car transformations, hit subscribe and join me on this journey. Let's continue building an awesome BMW community together!"
All Comments (8)
  • @OLearysBMW
    Highly recommend you to not wait for reinforcement, prefacelift cars tend to suffer the worst. If you were to take a wire brush to the RACP, you may find the spot welds starting to crack at left rear mounting point. 99-01 sedan can and absolutely will crack. Bare minimum you can install a trunk brace from above. Reinforcing from in-cabin will prevent the issue all together.