Citroen C4 Headlights: Specs, Fitment & Common Faults

Bulb type, unit part numbers, and the faults that actually cause that flickering or dim light you've noticed.

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OEM Part Number: confirm via VIN — aftermarket LH Valeo 451028 / RH Valeo 451029

Accuracy note: Covers the Citroen C4 (2021 on) as listed in the UK aftermarket catalogues. Headlights are sold by side (passenger / nearside = LH, driver's / offside = RH on a UK car) and by lamp type — halogen, xenon (D1S / D3S) and LED or full-LED units are not interchangeable, and DRL, cornering and levelling options change the part number again. The references below are UK aftermarket catalogue listings for this generation, labelled by brand; genuine numbers are shown only where a listing quotes one. Check the lamp type and traffic side (UK right-hand-traffic units, not LHD) against your VIN, and expect xenon / LED and adaptive units to need levelling adjustment or coding after fitting.

Passenger side (LH / nearside) headlight — aftermarket	Valeo 451028 (original-trademark unit, type not stated); Van Wezel 0989961V (halogen H7/H7, with levelling motor); Alkar 2741853 (halogen H7/H1, electric levelling motor); TYC 20-12944-05-2 (halogen H7/H1, with DRL and position light, electric levelling); Valeo 451330 (full LED with LED DRL, no bulbs); Van Wezel 0989965V (LED, with motor)
Driver's side (RH / offside) headlight — aftermarket	Valeo 451029 (original-trademark unit, type not stated); Valeo 045409 (original part, halogen H1/H7); Alkar 2742853 (halogen H7/H1, electric levelling motor); TYC 20-12943-05-2 (halogen H7/H1, with DRL and position light, electric levelling); Valeo 451331 (full LED with LED DRL, no bulbs); Van Wezel 0989966V (LED, with motor)
Bulb types	dipped H7, main beam H1, indicator PY21W, sidelight W5W, position light P21/5W on the halogen units; LED units have no replaceable bulbs
Genuine (OE) numbers quoted	None quoted in catalogue listings — order genuine units against your VIN
Fitment notes	Halogen and LED versions are both sold, so check whether the car has halogen or LED headlights before ordering; no xenon unit is listed; Valeo 450558 is listed with electric levelling and conflicting DRL information, so it is not recommended without checking.

A Genuinely Important UK Rule Worth Knowing Before You Buy — Citroen C4 Headlights

If your C4 has factory-fitted halogen headlamp housings, converting them to fit LED bulbs is treated as a definite MOT failure under the current inspection manual — this isn't a grey area or a minor advisory, since a housing designed for halogen doesn't distribute an LED bulb's light output correctly, which can genuinely dazzle oncoming drivers. If you want a genuine LED upgrade, the correct route is a complete headlight unit designed for LED from the factory, not a bulb swap into an existing halogen housing.

Before you buy: matrix LED, adaptive, and cornering headlight systems often require electronic coding to the car after a unit swap, even for a genuine like-for-like replacement — a headlight that isn't recognised by the car's electronics can trigger warning lights or fail to auto-level correctly. Check whether your specific trim has one of these systems before assuming a straightforward bulb-in, bulb-out job.

Citroen C4 Headlights: Watch: Replacing It

🎬 Watch: CITROEN C4 HEADLIGHT/HEADLAMP BULB REPLACEMENT HOW-TO (older gen)

Watch on YouTube ↗

Generation not confirmed (probably earlier C4); no C4 III video found

Citroen C4 Headlights: What It Does

On the Citroen C4, main and dipped beam bulbs — or LED/matrix modules on higher-spec cars — live inside the headlight unit, angled carefully to illuminate the road without blinding oncoming traffic. The daytime running light and front indicator often share that same housing too, adding complexity to both fitment and repair.

Citroen C4 Headlights: Generations & Headlight Type

Standard trims	Halogen as standard, with LED daytime running lights and full LED options available on higher trims and more recent model years

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Citroen C4 Headlights: Common Faults, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Headlights Guide for the four bulb technologies and how they differ, UK law on aim and modifications, common faults to check for, how difficult this job is to DIY, and confirming fitment against your VIN.

More Citroen Headlights

The same part, covered across other Citroen models.