Bulbs
General information
Replacing bulbs requires the skill of a specialist.
You can replace the following exterior lighting bulbs yourself:
- Headlamp: halogen bulb for low beam
- Headlamp: high beam bulb
- Rear light: all bulbs
The following bulbs may only be replaced by a specialist workshop:
- Headlamp: xenon lights*
- Headlamp: turn signal bulb (Longlife bulb)
- Headlamp: parking light bulb
- Fog lamp: bulb
- Fender turn signal bulb
In most cases, you must have a specialist replace defective bulbs. This applies especially to bulbs that can only be accessed from the engine compartment.
If in doubt, we recommend having bulbs replaced by a specialist or at a specialist workshop.
If, however, you want to replace bulbs in the engine compartment yourself, remember that the engine compartment is a hazardous area.
Bulb types
A bulb must always be replaced with a bulb of the same type. The designation is printed on the bulb base.

CAUTION!
- Use particular caution when working in the engine compartment and when the engine is at operating temperature - risk of burns!
- Bulbs are under pressure and may burst when replaced - risk of injury!
- On vehicles equipped with gas discharge headlamps* (xenon lamps), handle the high-voltage component correctly. Improper handling can be fatal!
Warning!
- Remove the ignition key before working on the electrical system - risk of short circuit!
- Switch off the lights/parking lights before replacing a bulb.
Environment
Ask a specialist workshop about the disposal of defective bulbs.
Note
- For your own safety and that of other road users, make sure that all lighting on your vehicle (especially exterior lighting) works properly.
- Obtain a replacement bulb of the same type before starting the replacement.
- Do not touch the bulb with bare hands. Use a cloth or paper to prevent fingerprints from being left on the reflector: when the bulb is lit, the heat causes them to evaporate, leaving marks on the reflector and rendering it ineffective.
Test yourself
A quick Audi A4 quiz: every answer comes with an explanation and a link to the manual page.