Good evening  to you all .hope you all had a good Christmas. ....my name is ian I have owned  my a5 now for about a year love  the car ....but got a problem  that I hope you all cam help me with ....my passenger side head light bulb keeps going out ....comes up on my dashboard. ..if I turn my lights of and back on will come back on for a while. ...changed bulb still the same please help thanks ian 

Hi Ian...welcome to the Forum

That's a strange fault....the only thing I can think of if it is a HID lamp is that the igniter/amplifier may be faulty.

Keep us updated on what you find.

Cheers  Trevor

Good morning  Trevor. ..thank you for your reply. ....do have a question. ...is the igniter...is that what is on the end of their bulb the square  box what the bulb fits in ....have replaced  bulb still the same ....i have also changed. ...the ballast from the drivers side no difference. ...thanks ian 

Seems like all the components it could have been you have replaced then.

I do wonder if it is the bulb....as in quality, maybe a fault with it?

Good evening  Trevor ..found  the problem. ...should have had d3s bulbs in had d1s bulbs in instead .....somebody  must have put them in before I bought the car .....the wrong bulbs didn't  have any stickers  on the back of the igniter  box .....had to ring my local audi dealer ....and they sorted it for me charged me 160 per bulb ...but at least it's sorted  ....

 

Great result Ian....not the cheapest bulbs but at least it's now sorted.