Audi A4   Self-help   Fuses and bulbs  Bulbs
Halogen rear light: Bulbs in side panel and boot lid
Fig. 1 Halogen rear light: Bulbs in side panel and boot lid
LED rear light: Bulbs in side panel and boot lid
Fig. 2 LED rear light: Bulbs in side panel and boot lid
You must only replace a bulb with a bulb of the same type. Information regarding e.g. the wattage can be found on the base of the bulb.
The description for changing the bulb refers to the left rear light unit; the procedure for the right rear light unit is similar.
Halogen rear lights
The following bulbs can be changed on vehicles with halogen rear lights Fig. 1:
Bulb (12 V)
 Version
-1- Turn signal (rear)
(side panel)
 PY 21 W
-2- Brake light/tail light
(side panel)
 W 16 W
-3- Reversing light
(side panel)
 W 16 W
-4- Tail light
(boot lid)
 W 16 W
-5- Rear fog light
(boot lid)
 H 21 W
LED rear lights*
The following bulb can be changed on vehicles with LED rear lights Fig. 2:
Bulb (12 V)
 Version
-6- Reversing light
(side panel)
 W 16 W
The light in the boot lid is maintenance-free.

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