**Located in the subframe as well as the wheel carrier, acts as the mounting point for the trailing arm** This bushing works as a connecting point for your BMW's rear trailing arm. As your vehicle ages these rubber components will begin to tear and eventually fail. If your rear end feels loose and seems to "wander" then it's very likely you need to replace your trailing arm bushings. We highly recommend replacing all 4 at the same time for best performance. **Note:** 2 per side (4 per car), priced and sold individually.