BMW 5 SERIES G30 G31 M PERFORMANCE REAR DIFFUSER NEW GENUINE 51192412409. BRAND NEW & GENUINE. 5 SERIES G30 G31. M PERFORMANCE REAR DIFFUSER. ALL ITEMS ARE NEW AND GENUINE BMW PARTS, UNLESS OTHERWISE STATED. WE WILL OF COURSE HELP AS MUCH AS WE CAN. We will of course help as much as we