Seat Ateca 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 044089 / RH Valeo 044090

Accuracy note: Covers the Seat Ateca (2016-) 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 044089 (halogen H7/H1 with W5W, PY21W, electric levelling motor, original part); Valeo 045100 (halogen H7 with PY21W, with DRL, original part); Valeo 045104 (LED control-unit headlight, with DRL, original part); TYC 20-11210-15-2 (halogen H7/H1, electric levelling motor); Abakus 445-1125L-LDEM2 (halogen H1/H7, electric); Hella 1EX 014 891-411 (LED with adaptive front lighting)
Driver's side (RH / offside) headlight — aftermarket	Valeo 044090 (halogen H7/H1 with W5W, PY21W, electric levelling motor, original part); TYC 20-11209-15-2 (halogen H7/H1, electric levelling motor); Abakus 445-1125R-LDEM2 (halogen H1/H7, electric); Abakus 445-1122R-LD-EM (halogen H7, chrome, electric); Alkar 2746099 (halogen H7/H1 with W5W, PY21W); Hella 1EX 014 891-421 (LED with adaptive front lighting)
Bulb types	dipped H7, main H1 (some units H7/H7), indicator PY21W, sidelight W5W; LED units have no replaceable main bulbs
Genuine (OE) numbers quoted	None quoted in catalogue listings — order genuine units against your VIN
Fitment notes	Halogen H7/H1 units suit base trims, while the Valeo 045104/045100 range (with DRL) and Hella 1EX 014 891 adaptive LED units suit LED-equipped trims

A Genuinely Important UK Rule Worth Knowing Before You Buy — Seat Ateca Headlights

If your Ateca 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.

Seat Ateca Headlights: Watch: Replacing It

🎬 Watch: Seat Arona headlight bulb replacement (sister (Seat Arona))

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No Ateca headlight video found in 3 searches (only interior/turn light/LED showcase clips); Arona is closest SEAT SUV on VW group MQB

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.

Seat Ateca Headlights: What It Does

Precise beam angling to light the road without dazzling oncoming traffic is the Seat Ateca's headlight unit's core job, housing the main and dipped beams — or LED/matrix modules on higher trims. Because it often also integrates the daytime running light and front indicator, both the part number and repair complexity increase accordingly.

Seat Ateca Headlights: Generations, Derivatives & Headlight Type

Standard trims	Halogen as standard on lower trims
Higher trims/FR	Full LED headlights become available, genuinely a different assembly and connector from the halogen units — not interchangeable without coding and an adapter

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Seat Ateca 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 Seat Headlights

The same part, covered across other Seat models.