For D1S bulbs. If your HID lights are shutting off randomly and your bulbs are in good shape, the ballasts might be the problem. This stock replacement ballast for your Mk6 GTI, Sportwagen, Tiguan, select BMW’s & Mercedes will restore the functionality of your headlights. This will fit on the left or the right side.
OE Part #’s
VW/Audi
5M0-907-391 / 5M0 907 391 / 5M0907391
BMW
63-12-6-937-223 / 63 12 6 937 223 / 63126937223
Mercedes
000-821-10-61 / 000 821 10 61 / 000.821.10.61 / 0008211061
MFR Part # 009000001
