dude, you can't replace the rear quarter yourself. This requires some major body shop work. Your car is unibody construction. Meaning the majority of the car is one solid unit. To replace the rear quarter, the original one needs to be cut out first and the new one welded back in. You are looking at around 8k of parts and labour at least at a reputable shop.
De-chromed; Reflectors Delete; M Performance Aero Kit; P3Cars Gauge; TE37s; Dinan S1
: Invidia N1, HID Conversion, Blacked Out, Rally Armor
2010 E92 335i, 2004 E46 325