Audi A3 Bulb Guide — Headlight & Indicator Bulbs (2020-2024)
Bulb Compatibility Chart
| Position | Bulb Type | Notes |
|---|---|---|
| Dipped Beam (Low) | H7 | Most common upgrade position |
| Main Beam (High) | H1 | Full beam headlights |
| Sidelights / DRL | W5W | Parking lights |
| Front Fog Lights | H11 | If fitted |
| Front Indicators | PY21W | Amber turn signals |
Recommended Bulbs for Audi A3
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Top Recommended Upgrade Bulbs
How to Change Headlight Bulbs
Changing the dipped beam bulb on the Audi A3 varies by side — one side often has more space than the other. General steps:
Step 1: Open the bonnet and locate the headlight unit. The bulb holder is at the back of the headlight assembly.
Step 2: Disconnect the wiring connector from the bulb. This usually has a clip or tab to release.
Step 3: Remove the dust cover (if present) by twisting it anti-clockwise.
Step 4: Release the bulb retaining clip and carefully remove the old bulb.
Step 5: Insert the new H7 bulb without touching the glass with bare fingers — oils from your skin reduce bulb life.
LED vs Halogen — What’s Legal?
If your Audi A3 came with halogen headlights from the factory, retrofit LED bulbs are not road legal in the UK and will fail an MOT. However, upgraded halogen bulbs (like the Philips X-tremeVision Pro150 H7) can offer up to 150% more light while remaining fully road legal.
Frequently Asked Questions
What headlight bulb does a Audi A3 use?
The Audi A3 (2020-2024) uses H7 for dipped beam and H1 for main beam headlights.
What are the best upgrade bulbs for a Audi A3?
The Philips X-tremeVision Pro150 H7 is our top recommendation, offering significantly brighter light output while remaining road legal.
Are LED headlight bulbs legal in the Audi A3?
LED headlight bulbs are only road legal in the UK if the vehicle was originally fitted with LED headlights from the factory. Retrofitting LED bulbs into halogen headlight housings is not currently road legal and will fail an MOT.
Other Audi A3 Guides
How we check fitment for this guide
We cross-reference fitment figures against manufacturer specifications and OE-supplier catalogue data where available, and matched to the standard codes that actually govern fit — battery type/group sizes, wiper lengths and fitting types, bulb fitment codes, tyre size markings, and oil specifications. We work by make, model, year, engine, and build date, because a single model can take different parts across its life. Where the right part depends on your exact vehicle, we tell you to confirm by registration or VIN. More on our method →