Mazda 3 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 20-14426-05-2 / RH Van Wezel 2745966

Accuracy note: Covers the Mazda 3 (BM 2013-2019) 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	Van Wezel 2745965 (LED, electric motor); Alkar 2735652 (LED, W21/5W, electric motor); Abakus 216-1177LMLDEM2 (LED, motor); Diederichs 5620183 (LED, motor); Diederichs 5620083 (xenon D4S, LED DRL); Abakus 216-1168L-LEHM2 (xenon D3S, DRL)
Driver's side (RH / offside) headlight — aftermarket	Van Wezel 2745966 (LED, electric motor); Alkar 2736652 (LED, W21/5W, electric motor); Abakus 216-1177RMLDEM2 (LED, motor); Diederichs 5620182 (LED, motor); Alkar 2766652 (xenon D4S, electric); Van Wezel 2745962 (halogen H11/H15, DRL, motor)
Bulb types	halogen dipped/main H11 with H15 daytime running; xenon D3S or D4S; indicator RY10W or WY21W; sidelight W5W; W21/5W on LED units
Genuine (OE) numbers quoted	None quoted in catalogue listings — order genuine units against your VIN
Fitment notes	Halogen, xenon and LED units are all listed; Van Wezel 2745965/2745966 and 2745962 are for the facelift, while Diederichs 5621080 is not for the facelift, so match the unit to the car's facelift status.

A Genuinely Important UK Rule Worth Knowing Before You Buy — Mazda 3 Headlights

If your 3 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.

Mazda 3 Headlights: Watch: Replacing It

🎬 Watch: How to Replace Headlight Bulbs - Mazda 3 (2014-2018)

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BM gen bulb change

Mazda 3 Headlights: What It Does

The Mazda 3's headlight unit houses the main and dipped beam bulbs (or LED/matrix modules on higher trims), positioned and angled to illuminate the road ahead without excessively dazzling oncoming traffic. Many modern units also integrate the daytime running light and front indicator into the same housing, which affects both the part number and the complexity of any repair.

Mazda 3 Headlights: Generations & Headlight Type

Standard trims	Halogen as standard on entry trims
Sport/higher trims	Full LED headlights with automatic on/off become available, genuinely a different assembly and connector from the halogen units on lower trims — not a simple bulb swap

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Mazda 3 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 Mazda Headlights

The same part, covered across other Mazda models.