Screeching sound from rear suspension

[Harry75]

Hi All,
I am a new member on bimmerforums.com. I won a 323Ci 2000 BMW. There I some Screeching sound from the rear suspension, specially when I back up, or accelerates from zero and at small bumps. Some one told me it is because of bad shock mounts. I got the rear shock mounts and the shocks changed, the sound has reduced but not gone fully. Any advice is welcome

[TRuckee]

It could be a wheel bearing. Try jacking the car up to unload the wheel and see if you can move it around... like it probably shouldn't move. I Just R&R'd a rear wheel bearing on my 323i at 97,000 miles.

[Harry75]

It is definitely not the wheel. If my car is still and i move it up and down by applying force on the trunk, giving sudden jerks, I can still hear the sound. It is definitely from the suspension. I have replaced the studs and the shock absorber mounts. I cannot think where else can me making that sound in the suspension?

[wfuerte328i]

i have a 00 328i, and ive had the same problem for a while now and all the suspension components seem to be fine. i did some research and found this...
BMW 3 Series Defect - Subframe Crack - Law Firm Wasserman, Comden & Casselman, LLP Attorneys Tarzana, California

i looked under my car, and sure enough, the floor board is cracked really bad. its only on the driver's side though.

[Harry75]

Thanks for the information bro. I will surely look under my car tomorrow morning. Are you planing to some ting about this?

[wfuerte328i]

yeah, i went to bmw's site and got a number to contact someone at. I submitted a form and the guy already got back to me. He said he will contact me within a few days to schedule and appt. to meet with a technician to inspect my car at the dealer, and hopefully things will go good from there. Ill keep u posted on what happens tho, i hope they dont try to haggle me and blame it on something else, cuz my only mod is rims, but they are still only 17's.