Sunday, 22 May 2011

Best way to replace Audi A4 B6 headlamp bulb

Replacing a headlamp bulb on an Audi A4 (B6)

I recently bought a 2004 Audi A4 (B6) RHD - the catch was that it had completed just under 150,000 miles. No problem, most of these were motorway miles, and in general the car is extremely tidy and well maintained, having had one very careful owner.

Since buying the car, I've completed about 2,500 miles and have fortunately only suffered a jammed CD in the CD changer, and more recently a blown left-hand dipped bulb. Usually a blown bulb shouldn't be too much of a problem, however the owners manual advises having them changed by a professional.

Hmmm.... as the blog title suggests, I'm not particularly mechanically minded, but if I can fix something myself, I will try and have a go.

Having read (nearly) every page on the Internet related to B6 headlamp bulb replacement, there didn't appear to be any decent pictures, or common approach, and all the suggested screwdriver bit sizes seemed to differ too. I've completed the job tonight, so while everything is still in my head, I thought I would write a quick blog post which will hopefully help others owners out too.

Tools and parts required
  • Torx T-30 screwdriver (I used a normal bit-holding screwdriver, coupled with a Torx T-30 bit)
  • 499 H7 bulb

  • Headlamp / inspection lamp
  • To be extra safe, you could disconnect the battery. Make sure you know your radio code etc. in case this is wiped.
  • Cup of tea

Now you've got everything you need, let's start
  • This may sound obvious, but firstly make sure you've identified the correct bulb - you don't want to be replacing the wrong one.
  • The bulb I was replacing was the passenger-side dipped bulb. (I may cover the driver-side in a future post as and when that bulb goes, however it's pretty much the same, but you need to remove the plastic cover over the air intake)
  • Remove the two torx screws on the top of the headlamp unit:

  • Next, locate the left-hand rear screw. You don't need to remove this, just unscrew a few turns. Loosening this screw will enable you to remove the headlamp cluster. This screw isn't too hard to find - see the picture below:

  • The rear right-hand screw is a bit harder to find. I've read in other how-to guides that you can remove the cover of the power-steering reservoir - I'm not sure how much that will help; The screw is tucked underneath a cable which can be seen in the picture below - in this picture, the headlamp has already been removed which should help you see where it is located. Again, you only need to loosen this screw, do not remove it. The gap is fairly tight between the cable and the reservoir, but with a head torch/inspection lamp, you should see it:

  • With the two top screws removed, and the two rear ones loosened, disconnect the wiring harness from the rear of the headlamp cluster:

  • You should now be able to gently prise the headlamp cluster forward out of the front of the car.
  • With the cluster removed, undo the rear of the cluster by unhooking the metal hook:

  • Disconnect the wiring block from the rear of the bulb, and unhook the wire hook retaining the bulb:

  • Once you've removed the old bulb, take your new one (I recommend opening the box from the bottom so you don't end up touching the bulb glass itself) and replace.
  • Now just reverse all of the actions above, and test the new bulb is working fully.

Job done!

Disclaimer: In no event shall the author of this blog be liable for any incidental or consequential damages resulting from use of the material. The author of this blog does not accept liability for any injury, loss or damage incurred by reliance on the information or advice provided in the pages and sub-directories of this website or incorporated into them by reference. I am not a mechanic, I am just sharing my experiences with others, hoping that others may benefit.


  1. I just used this directions. It was super easy!

  2. Hi Randy,

    Glad you found it useful!


  3. Great just done mine . dont think i would have found the 2 back screws Thanks..

    1. Nice one. Cheers Steve, glad you found the guide helped.

  4. Great guide was this the H7 or H4 bulb please? My dipped headlights seem a bit dim so thinking about upgrading. I want to make sure I get the right bulbs.

    1. Hi Zippy,

      Thanks for your feedback. It was the H7 I used for replacement - I believe this is the standard bulb for this particular model.

      Check out for a good tool for checking compatibility.


  5. Changing your cars light bulbs may be a complicated task at first. But once you learn it, it would be a breeze and you wouldn’t have to fear when your light bulb gives out while you’re on the road. It would also be logical to buy more than one spare part. If one gives out, you have a backup at your convenience. Thanks for sharing, Adam!

    Enoch Ross

    1. Couldn't agree with you more, and that's a great point about carrying multiple spares! Thanks for your feedback Enoch and glad you found the post useful!


  6. Thanks very much for taking the time to show us 'non skilled' people how to do this in a very simple well explained and illustrated way, great job!

  7. Thanks Ian,

    Glad it's been of use to you!


  8. Great post, Adam!
    Just have a quick question: in the second picture of this posting, to the right of the red arrow (above the left-hand rear screw), there's a black plastic tube/cable attaching to the headlamp. It prevents me from removing the headlamp. Do you have any suggestion on how to disconnect them.
    Thank you very much

  9. Hi, thanks for your comment. It should be possible to gently prise the cable away from the light cluster. If it's not been removed for a long time, it can be quite stiff. If you see in the fourth picture there is a clip on the left hand-side that may require a small screwdriver to help with the removal.

    Hope that helps,