I need advice...tried to send question but don't think it went? Ok so purchased set of rear tires (350.00 for nice set) within 4 to 5 months worn down to what resembled a set of racing slick tires...so local repair shop said for me to replace rear struts..so did that then bought two new rear tires and yup u guessed it...happened again. Local shop then says all 8 rear bushings were worn so have to replace all so he can align rear and all fixed..right? Well I then called BMW dealer to inquire how to get bushings..cost..delivery etc..that is when they tell me rear bushings can't be purchased..but rather entire control arms need to be replaced ( oh yeah three control arms on each the left and right side) to a cost if 1500.-1800.per side....so please give me any help..suggestions