The brake lights on my B7 (2005.5-2008) Audi A4 went out several weeks ago – I delayed and delayed replacing them, figuring it was a difficult process. I’m happy to say it is simple as pie, takes only about 5 minutes, and all you need is a flat head screwdriver! This is a super easy replacement that nearly anyone can handle
- Skill level: Beginner
- Tools needed: flat headed screw driver (a smaller one)
- Also applies to: 2005.5-2008 B7 Audi S4, 2005.5-2008 B7 Audi RS4
- Time needed: 5 minutes
- Parts needed: two 7506 bulbs. I used these Sylvania Silverstar bulbs which are 20% brighter, but any 21 watt 7506 ST bulbs will work.
Step 1 – Remove the cover located in the trunk
You can remove the cover using your flat head screw driver – open your trunk and you’ll find it right along the edge of the tail light. Pry it off from the top – it’s connected at the bottom, so don’t pry from there, always go from the top.
Step 2 – Remove the screw holding the tail light in
There is only one screw holding in the tail light, which you can see once you remove the cover in step 1. Turn the screw to the left with your flat headed screw driver and it will come out with ease after several turns. You’ll notice I changed screwdrivers, that is mostly because the screwdriver in the previous photo was too large, and I had to switch to a smaller one.
Step 3 – Remove the tail light assembly
This step requires you to be gentle. Use your hands and slowly pry away the tail light from the body of your car. Be sure not to pull too hard from the inner edge – the outer edge of the light has two connectors that you don’t want to break. Pull a little from the inner edge, then pull a little from the outer edge, then repeat and repeat until the light pulls away from the car enough to grab from the center.
The two clips holding it in (that you do NOT want to break) are the two holes in the body which can be seen above, and the two prongs sticking out of the tail light, which you can see below:
Step 4 – Remove the tabs:
Once apart, disconnect the wiring harness and then remove the black backing from the tail light housing by pushing the tabs in, which will then expose all of the bulbs. Just push in the two tabs (one on top, one on bottom) to remove the bulbs from the brake light assembly:
Step 5 – Replace the bulb
The bulbs twist out by turning them to the left about a half turn. In my case, it was easy to spot the burnt out bulb as it had turned black (see the upper right corner), but like I said, you might as well replace them both.
Step 6 (Optional): Clean
While you have the tail light off, you might as well clean. I used a spray detailer to remove the dust behind the tail light to keep my car looking extra clean:
Step 7: Install the bulbs, Test & Reinstall the tail light housings
Put the new bulbs in by aligning the nubs and then turning them a quarter turn so they’re locked in place. Before you screw the tail light back in, give it a quick test. Hitting the lock button will light up the tail light, so you don’t need to even get in your car to do this. Plug the brake light housing back into the car and just let it rest on the ledge, then hit the lock button and confirm everything works.
Once finished, reinstall the light by pressing in the two prongs along the outer edge, then tighetening the screw from inside the trunk. Once the screw is tight, replace the carpeted cover and you’re all done!
There you have it – you can now replace your burnt out tail light bulbs in under 5 minutes, costing you only about $6. From what I’ve read, the dealer charges anywhere from $40-80, so that’s a great deal and only requires minimal effort.
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