B7 S4 - flickering headlamp

[TTOBES]

Evening all,

Just driven Dad's S4 and the nearside headlamp flickers occasionally. More like it's got a nervous twitch.

Other forums I've just seen say it could be a xenon control unit or bulb issue.

I guess it needs to be taken to a workshop for fixing?

Thanks

[Plipton]

Could be a dodgy connection. Try wiggling wires while the light's on and see if the fault is repeatable.

[RobbyJ]

Sounds like a issue with the ballast for the headlight

[iluvmercs]

My RS4 had exactly this happen on both headlights.
I had the wiring & connections checked, then replaced both headlights, but it still did it.

Turned out to be the control units behind the headlights, replaced with new OEM units from a main dealer.
If your Dad's problem proves to be the control unit, he should be prepare himself for a larger bill should he choose the main dealer route.

Darren

Edited by iluvmercs on Wednesday 3rd December 15:27

[Adrian E]

Try swapping the bulb from side to side and see if the problem moves with it. most likely it won't, so it'll be either wiring or ballast, as suggested

[SuperchargedVR6]

Is it actually a flicker, or a wobble over bumps?