Replacing a bulb
Under certain climatic conditions (low temperature, humidity), condensation may form on the inner surface of the headlamp and rear lamp lenses. This is normal and disappears a few minutes after the lights are switched on.
Never look closely at the light beam of LED lamps - Risk of serious eye injury!

The headlamps are fitted with polycarbonate lenses coated with a protective varnish:
- Do not clean them with a dry or abrasive cloth, or with a detergent or solvent.
- Use a sponge and soapy water or a neutral pH product.
- When using a high-pressure washer on stubborn dirt, do not hold the lance on the headlamps, lights or their surrounds for prolonged periods, to avoid damaging their varnish and sealing gasket.
Always replace a bulb with the ignition off and the headlamp / light switched off for several minutes - Risk of serious burns! Do not touch the bulb directly with your fingers: use lint-free cloths.
Only use anti-ultraviolet (UV) bulbs to avoid damaging the headlamp.
Always replace a faulty bulb with a new bulb of the same part number and specification. To avoid unbalanced lighting, replace bulbs in pairs.
Refitting the lights
Carry out the operations in the reverse order of removal.
Headlamps and light-emitting diode (LED) lights
Depending on version, the headlamps / lights concerned are:
- LED headlamps.
- Front fog lamps.
- Side repeater indicators.
- Side spot lamps.
- Brake lights.
- Third brake light.
- Rear position lights.
- Number plate lights.
For replacement of this type of light, you must contact a CITROËN dealer network or a qualified workshop.
Do not touch LED lamps - Risk of electric shock!
Front lamps

- Daytime running lights or direction indicators (LED)
- Dipped beam (LED)
- Daytime running lights (LED)
- Main beam (LED)
- Fog lights (P21W or LED)
Fog lights (P21W)

► Insert a flat-blade screwdriver into the hole in the trim.
► Pry with the screwdriver to release the trim from the fog lamp.
► Using a Torx screwdriver, remove the two module mounting screws.
► Remove the module from its housing.

► Disconnect the bulbholder connector.
► Turn the bulbholder a quarter turn and remove it.
► Replace the assembly.
To replace this type of bulb, you can also contact a CITROËN dealer or a qualified workshop.
Rear lamps

- Brake lights (LED)
- Position lights (LED)
- Turn signals (WY21W)
- Reversing lights (W16W)
- Fog lights (P21W)
Turn signals (on the fenders)

► Open the tailgate, then unclip the access panel on the corresponding side.
► Loosen the 2 light mounting nuts using a 10 mm socket wrench.
► To prevent the nuts from falling into the wheel arch liner, first place a cloth at the bottom.
► Unscrew and remove the light mounting nuts by hand.

► From the outside, carefully remove the light by pulling it rearward, then upward.
► Release the cable grommet from the panel.
► If necessary, use universal pliers to turn the bulbholder a quarter turn and remove it.
► Disassemble the light and replace the bulb.
Reversing lights (on the tailgate)

► Open the tailgate, then insert a flat-blade screwdriver into the notch to unclip the access panel on the corresponding side.
► Unscrew and remove the 2 Torx mounting screws of the light using a Torx screwdriver.

► From the outside, carefully remove the light by pulling it rearward.
► Disconnect the light connector by pressing on each side.
► Turn the bulbholder a quarter turn and remove it.
► Disassemble the light and replace the bulb.
Fog lights

These bulbs are changed from outside the rear bumper.
► Reach your hand under the bumper.
► Turn the bulbholder a quarter turn and remove it.
► Turn the bulb a quarter turn and replace it.
To change the bulb within a few minutes after switching off the ignition, be careful not to touch the exhaust pipe - Risk of burns!
Test yourself
A quick Citroen C5 Aircross quiz: every answer comes with an explanation and a link to the manual page.