Citroen C4 Fog Lights: Specs, Fitment & Common Faults

A genuinely important fact: correct wiring alone isn't enough — the BSI must be specifically coded to enable front fogs, plus a genuine, distinct fault where fogs turn on by themselves.

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A Genuinely Important Fact: Correct Wiring Alone Isn't Enough

If you're retrofitting front fog lights, or troubleshooting fogs that don't respond despite everything appearing correctly wired, this is genuinely worth knowing: the BSI (the car's central electrical control module) must be specifically told via diagnostic software that front fog lights are fitted, even when the physical wiring, relay, fuse, and switch are all genuinely present and correctly connected. Without this specific coding step (accessible through DiagBox under manual configuration and car options), the BSI simply won't activate the fogs regardless of how correctly everything else has been wired — a completely different issue from a wiring fault, and one that basic electrical troubleshooting alone won't fix.

It's also worth knowing that fogs on this platform, like on related Stellantis models, are frequently controlled without a conventional dedicated fuse listed in the handbook at all — if you've searched the fuse box diagram thoroughly and found nothing specifically for fog lights, this may genuinely be correct rather than something you've missed.

Citroen C4 Fog Lights: Rarely Used, Easy to Forget About Until Needed

Because the Citroen C4's fog lights spend most of the year switched off, a developing fault is easy to miss entirely — right up until the one genuinely foggy commute where you actually need them and discover they don't work.

Citroen C4 Fog Lights: Watch: Replacing It

no C4 III fog video found

OEM Part Number: confirm via VIN — aftermarket Valeo 047453

Not every C4 trim comes with front fog lights — some use a styled blanking cover in the same bumper location instead. Confirm your exact trim before assuming this part applies to your car.

Citroen C4 Fog Lights: What It Does

Front fog lights are angled and positioned to illuminate the road surface in low visibility conditions without creating the glare a standard headlight beam would in fog. Some higher trims of the C4 integrate fog lights into the same housing as cornering lights or daytime running lights, which affects both the part number and the complexity of any repair.

Fitment & Compatibility

Citroen C4 Fog Lights: Generations & Fog Light Type

Not every trim level of the C4 comes with fog lights fitted as standard, and the housing design often differs between trims that have them integrated with other lighting functions and those with a standalone unit. Always confirm your specific trim's fitment before ordering. Whether you're sourcing a replacement fog lights for your Citroen C4 from a dealer, specialist, or online marketplace, always check compatibility against your registration or VIN before buying, and confirm you're ordering the correct side — driver's side (RH in the UK) or passenger side (LH in the UK) — since these are not interchangeable.

Citroen C4 Fog Lights: Common Faults, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Fog Lights Guide for common faults to check for (including exactly what fails an MOT), how easy this job is to DIY, and aftermarket advice.

Read our full Citroen C4 review

More Citroen Fog Lights

The same part, covered across other Citroen models.

• Citroen Berlingo Fog Lights
• Citroen C1 Fog Lights
• Citroen C3 Fog Lights
• Citroen C4 Cactus Fog Lights
• Citroen C4 Picasso Fog Lights
• Citroen C5 Aircross Fog Lights