1. Switch off the ignition.
2. Loosen the screws with a Torx screwdriver.
3. Turn the bulb holder counterclockwise and pull it out.
4. Pull out the defective bulb and insert a new one.
5. Reinsert the bulb holder into the housing and turn it clockwise.
6. Reinstall the housing and screw it into place.

NOTE
Other bulbs may be difficult for you to replace yourself. Let a trained and qualified Volvo service technician replace these bulbs if necessary.