Jan 21 2008
PowerFlex Rear Trailing Arm Bushings (RTAB) E46 M3
This past week I felt my rear end shift a bit when accelerating and also when braking hard. After reviewing similar stories of people with M3s, I took the plunge and ordered some aftermarket RTABs. The options based on reviews were the Rogue Engineering RTABs (RE RTAB) or the PowerFlex RTABS. Supposedly, these get shot around 50K miles; and I have 52K so this is quite expected indeed.
Dealer charged $425 for the labor to replaced the RTABS then $200 for an alignment. Pretty high but not a huge rip off.
WOW what a difference. After installing these, my rear feels a lot tighter. Definitely a must-have mod for any M3, as the OEM ones are prone to failure. With an aftermarket suspension (I’m running on Tein S-tech + Koni adjustables), you can expect the bushings to wear out quicker.
