Audi A6 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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Audi A6 Headlights: OEM Part Number

Accuracy note: genuinely worth knowing: adjusting headlight aim correctly after replacement matters on the A6 as much as sourcing the right part — many replacement units ship in a default position that needs recalibrating, and getting this wrong can genuinely dazzle other road users even with a technically correct part fitted.

A Genuinely Important UK Rule Worth Knowing Before You Buy — Audi A6 Headlights

If your A6 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 A6 Headlights: What It Does

Precise beam angling to light the road without dazzling oncoming traffic is the Audi A6'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.

Audi A6 Headlights: Generations & Headlight Type

C5 (1997–2004)	Halogen or single-Xenon depending on trim, both using projectors now known to have documented reflective-layer degradation with age, causing dangerously low light output on unrestored examples
Current generation	LED standard, with Matrix LED and HD Matrix LED (using digital micromirror technology) offered as higher options

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Audi A6 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.