For Audi A4 Volvo Citroen Xenon Headlight HID Ballast Control Unit Module 4 PIN

Citroen C4 Coupe (LA_) (2004/11 - 2011/07). Citroen C4 I (LC_) (2004/11 - 2011/07). Citroen C5 II (RC_) (2004/08 - /). Citroen C5 II Break (RE_) (2004/09 - /). Audi A4 (8E2, B6) (2000/11-2004/12). Audi A4 Avant (8E5, B6) (2001/04-2004/12).