I am doing an overhaul of the suspension on my BMW. I am literally replacing everything that has rubber and upgrading some parts. SO in the back, I am upgrading 4 control arms (2 on each side) to M3 ones. There is a total of 4 control arms on each wheel, but only 2 can fit from M3. They are forged aluminum, stronger and lighter than stamped steel on regular suspension. They are a big improvement in handling.
Anyway, as one might suspect M3 control arms are not the cheapest. The set of 4 that fit regular E90 in the rear (I cannot go in the front with M3 arms as my BMW is xDrive) is around $847. TRW is OE supplier to BMW.
However, the replacement TRW set of 4 is between $350 and $400.
This is how OE BMW looks like:
As you can see, OE arms have M logo stamped in the middle:
These are TRW replacement arms I purchased:
As you can see, M logo is scratched. So the difference is some $450-500 because the logo is scratched.
Shop around people!
Anyway, as one might suspect M3 control arms are not the cheapest. The set of 4 that fit regular E90 in the rear (I cannot go in the front with M3 arms as my BMW is xDrive) is around $847. TRW is OE supplier to BMW.
However, the replacement TRW set of 4 is between $350 and $400.
This is how OE BMW looks like:
As you can see, OE arms have M logo stamped in the middle:
These are TRW replacement arms I purchased:
As you can see, M logo is scratched. So the difference is some $450-500 because the logo is scratched.
Shop around people!