Xenon Ballast Control Unit for Audi A4 S4 BMW E81 E87 C4 C5
Restore stable ignition voltage to your headlight assembly with this aftermarket Xenon Ballast Control Unit. Engineered as a direct replacement for OEM references 3D0907391B, 8E0907391A, and 63126938561, this unit resolves common electrical faults such as flickering beams, delayed startup, and intermittent projector lens failures. Each component undergoes factory testing before dispatch, delivering the precise high-voltage current needed for crisp night driving visibility without requiring a complete headlight housing overhaul.
Benefits & Practical Tips
- Confirm your vehicle features a standard 4-pin power connector before mounting, especially for Jaguar XJ8/XJR and Cadillac CTS/SRX chassis.
- This ballast utilizes an H1 socket interface; match your existing wiring harness pin layout to avoid unnecessary adapter modifications.
- Secure all connection points with dielectric grease and route the unit away from exhaust manifolds to prevent thermal degradation and extend service life.
Product Specifications
- Brand: Malcayang
- OEM Cross-Reference Numbers: 3D0907391B, 8E0907391A, 63126938561, 3D0907157, 5139061AA
- Socket Configuration: H1
- Verified Vehicle Platforms: Audi A4/S4 B6 (2000–2004), BMW 1 Series E81/E87 (2003–2012), Citroën C4/C5 (2004–2008), Seat Ibiza/Cordoba (2002–2009), Opel/Vauxhall Meriva (2003–2010), VW Passat B6/Touareg, Volvo S80/S60/V70/XC90, Chrysler 300C (2005–2006)
- Condition: 100% new housing with factory-tested circuitry
- Classification: Aftermarket replacement, not original manufacturer part
Package Includes:
- 1 × Xenon Ballast Control Unit
Installation Warnings
- Professional automotive electrical installation is strongly recommended due to varying harness routing and fuse rating across model years.
- Manual machining tolerances may allow a 1–2 mm dimensional variance; provide a clear photograph of your existing unit along with your VIN for final compatibility verification.
- Ambient lighting conditions and monitor calibration may cause superficial housing color differences compared to reference imagery.
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