[bigjae1976]

I put urethane subframe bushings in my E46. I haven't noticed any squeaking or increased noise. Maybe my urethane engine mounts and exhaust drown out all of the noise.

Experts have attributed the rear subframe failure in the E46s to faulty subframe bushings. The bushing goes bad, so the subframe twists more which increases the stress on the mounting points.

So I'm hoping that the urethane bushings will last a lot longer...so I don't have to replace the bushings again. I also reinforced the mounting points.

Not sure if E9X will have the same subframe issue.

My theory is that the two poly bushings that will make the biggest difference in NVH is the rear shock mount and the rear trailing arm bushing.