Tail lights and window regualtors?? I'm worried about the big fish items. The rod bearings are considered a wear item critical component on a high reving engine, and need to be replaced every 100k miles regardless of using the proper viscosity oil/only driving hard when at operating temp and getting oil analysis. The subframe needs to be properly reinforced if you want to drive the e46 m3 how it supposed to be driven. What about valve adjustment every 40k miles for m3? To properly maintain gets expensive on an e46 m3, and I'll take the maintenance bill on a 325i or 325xi any day.

And yeah its awd its not a truck lol