Xenon HID Ballast Control Unit – 35W – For Audi A3 A4 A5 A6 A7 A8 – Replaces 8K0941597B/C/E – D3S Bulb Fitment – Partscollect

Is your Audi headlight flickering or not firing up at all?

Might be the ballast.

This little box is the control unit for your xenon HID system.

Fits a ton of models: A3, A4, A5, A6, A7, A8—basically anything running the 8K0941597B, 8K0941597C, or 8K0941597E ballasts.

\n\nIt’s 35 watts, runs at 42 volts, and accepts D3S bulbs.

Direct swap, no mods needed.

Partscollect brand, part number W003T20171.

Also crosses to BAM92143700, A2048703226, and others.

\n\nPlacement is front, left or right headlight.

Works for high beam, low beam, bi-xenon—dual beam setups too.

UPC is 710359158887.

Comes with the ballast included, obviously, and backed by a manufacturer warranty.

Don’t let one bad ballast keep your whole front end looking dim.