GooDeal Xenon HID Ballast 130732915301 for 2007-2009 BMW 328i 328xi 335i 335xi M3 X3 Interchange AL part#: 1307329153, 130732915301, 1307329193, 130732919301 This ballast will fit both left and right sides. There are no wires to splice or expensive programing to be done, just plug it in and your good to go. It is also referred to as a control unit, Computer ECU or a Module. BMW \ Mini Cooper Part#: 63117182520, 63112754797; Audi Part #: 8J0907391; Cadillac \ GM Part#: 25806714 Note: NOT for E90 4 door SEDAN; NOT for DTS with 3 mounting bolts. Some makes and models use 2 different ballasts types for the same year of car. 2007-2009 BMW E92 E93 M3 328i/328xi/335i/335xi Coupe and E90 M3 Sedan (NOT for E90 4 door SEDAN); 2008-2009 BMW 6 series E63 E64 650i M6; 2007-2010 BMW E83 X3; 2007-2010 BMW E70 X5; 2007-2009 Mini Cooper / Cooper S; 2007-2011 Cadillac DTS "WITH 4 MOUNTING BOLTS". This model uses two types of ballasts.