Audi A4 Headlights: Specs, Fitment & Common Faults

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

Illustration for editorial purposes

Opens live listings in a new tab.

OEM Part Number: confirm via VIN — aftermarket LH TYC 20-11544-06-2 / RH TYC 20-11543-06-2

Accuracy note: Covers the Audi A4 (B8 2008-2015 (also note B9)) 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	TYC 20-11544-06-2 (halogen H7/H7, P13W, with DRL, electric levelling); TYC 20-14178-05-2 (halogen H7, PSX26W, DRL, electric); Abakus 446-1121LMLDEM2 (halogen H7, DRL, electric, no bulb); Van Wezel 0307983 (bi-xenon D3S, LED DRL, automatic levelling); TYC 20-11464-06-2 (xenon D3S, LED DRL, electric); Magneti Marelli 711307022798 (bi-xenon D3S, motor)
Driver's side (RH / offside) headlight — aftermarket	TYC 20-11543-06-2 (halogen H7/H7, P13W, DRL, electric); TYC 20-14177-05-2 (halogen H7, PSX26W, DRL, electric); Abakus 446-1121RMLDEM2 (halogen H7, DRL, electric, no bulb); Van Wezel 0307984 (bi-xenon D3S, LED DRL, automatic levelling); TYC 20-11463-06-2 (xenon D3S, LED DRL, electric); Magneti Marelli 721307022799 (bi-xenon D3S, automatic levelling)
Bulb types	halogen H7/H7 dipped and main, sidelight P13W or PSX26W; xenon D3S with LED DRL, PSY24W or PWY24W indicators
Genuine (OE) numbers quoted	None quoted in catalogue listings — order genuine units against your VIN
Fitment notes	B8 is mostly H7 halogen or D3S xenon/bi-xenon (units marked "to 2010" suit early cars); B9 is LED or D5S xenon, and Van Wezel 0346981/0346982 are H8 units "not for facelift".

A Genuinely Important UK Rule Worth Knowing Before You Buy — Audi A4 Headlights

If your A4 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.

Audi A4 Headlights: Watch: Replacing It

🎬 Watch: AUDI A4 Headlight Bulb Replacement - (2008-2014 B8 / B8.5)

Watch on YouTube ↗

B8 only; no B9-specific A4 video found in 3 searches (W45OOUG-IiU covers 2018-2025 A4/A5/A6/A7 B9-era)

Audi A4 Headlights: What It Does

The Audi A4'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.

Audi A4 Headlights: Generations, Derivatives & Headlight Type

B6/B7, factory options	H7/H7 halogen, single-Xenon (D1S/H7), or Bi-Xenon (D1S/H7) depending on trim — all three are genuinely different projector sizes and designs, not just bulb swaps
Current generation, all trims	LED headlights are standard across the board
Current generation, top trim	Matrix LED with fully automatic high beam is offered as the top-tier option, genuinely different from the standard LED fitted elsewhere in the range

Find Audi A4 Headlights Here!

Opens live listings in a new tab.

Audi A4 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 Audi Headlights

The same part, covered across other Audi models.