Vauxhall Astra Owner's Manual page 172

3. Loosen fastening nuts with wheel
bolt wrench and unscrew by hand.
Vehicle tools 3 183.
4. Detach bulb housing towards the
rear.
5. Remove seal from the fastening
bolt. Press the locking tabs on the
outside of the bulb holder outward
and remove the bulb holder.
Vehicle care
6. Remove and renew the bulb.
Reverse light (1)
Turn signal light (2)
Reverse light/brake light (3)
Reverse light (4)
Fog light, may be only on one side
(5)
7. Engage bulb holder in bulb
housing, ensuring that it properly
engages.
171