Fiat 500L 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 TYC 20-14210-05-2 / RH TYC 20-14281-05-2

Accuracy note: Covers the Fiat 500L (2012-) 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	Magneti Marelli 712475331129 (halogen H7 with WY21W, electric levelling, bulbs included); Magneti Marelli 712475385129 (halogen H7 with PY21W, bulbs included); Van Wezel 1609963 (halogen H7, electric levelling); TYC 20-14210-05-2 (halogen H7, electric levelling); Alkar 2751348 (halogen H7 with WY21W, electric levelling motor); TYC 20-14282-05-2 (halogen H7 with W21/5W and DRL)
Driver's side (RH / offside) headlight — aftermarket	Magneti Marelli 712475231129 (halogen H7 with WY21W, electric levelling, bulbs included); Magneti Marelli 714081765251 (LED with H7 and LED DRL, bulbs included); Van Wezel 1609964 (halogen H7, electric levelling); Van Wezel 1609966M (halogen H7, electric levelling); Alkar 2752348 (halogen H7 with WY21W, electric levelling motor); TYC 20-14281-05-2 (halogen H7 with W21/5W and DRL)
Bulb types	dipped H7, indicator PY21W or WY21W, DRL and sidelight W21/5W; H4 on the lower-spec Diederichs units
Genuine (OE) numbers quoted	None quoted in catalogue listings — order genuine units against your VIN
Fitment notes	Most units are halogen H7 with electric levelling, with a separate DRL version and a single LED version from Magneti Marelli; no xenon is listed.

A Genuinely Important UK Rule Worth Knowing Before You Buy — Fiat 500L Headlights

If your 500L 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.

Fiat 500L Headlights: Watch: Replacing It

🎬 Watch: Replacing Fiat 500L Headlight Bulb the EASY way

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Fiat 500L Headlights: What It Does

On the Fiat 500L, the main and dipped beams, whether conventional bulbs or LED/matrix modules on higher trims, sit inside the headlight unit at an angle calculated to illuminate the road without dazzling other drivers. Many modern units also combine the daytime running light and indicator into that same housing, adding a layer of complexity to both part numbers and repairs.

Fiat 500L Headlights: Generations & Headlight Type

All generations	Halogen as standard, with LED daytime running lights and higher-spec bulb options on some trims and later model years

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Fiat 500L 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 Fiat Headlights

The same part, covered across other Fiat models.