Just purchased after patiently waiting, a 1989 325is a little high mileage but runs well. California car very good body no rust,white exterior beige interior W/leather sport seats no mods except for a M series cluster and shift knob,lowering spring's. Passed smog everything works so far, but has a nice howl in rear any idea's?? Anyway's happy to be a part of this site and thank you for any advice on my cars rear end noise