Audi A4 Headlight Bulb Size
Find the correct headlight bulb size for your Audi A4. Covers low beam, high beam, fog lights, and turn signals for all years.
Last updated: 2026-05-07 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
The Audi A4 headlight bulb size depends on the model year and trim. Common sizes include H11 (low beam), 9005/HB3 (high beam), and H16 (fog lights) — see the full breakdown below.
| Generation | Years | Top spec |
|---|---|---|
| 2019-2024 | 2019-2024 | LED (factory) or H11 equivalent |
| 2013-2018 | 2013-2018 | LED (factory) or H11 equivalent |
| 2007-2012 | 2007-2012 | H11 or H7 |
Know the exact headlight bulb size job for your Audi A4
The Audi A4 headlight bulb size depends on the model year and trim. Common sizes include H11 (low beam), 9005/HB3 (high beam), and H16 (fog lights) — see the full breakdown below.
Bulb size can change between reflector, projector, HID, LED, and market-specific housings. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
Use the archive navigator when you need the exact engine, trim, or production-branch manual instead of a broad year-range summary. That keeps the buying list and repair steps aligned with the real vehicle.
2013-2018
Representative 2013 manual branch for 2013-2018
Side Mirror Turn Signal Inoperative (GROUP 94, NO. 12-90)
A4 Base
Side Mirror Turn Signal Inoperative (GROUP 94, NO. 12-90) — 2013 Audi A4 Base Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >> Audi >> 2013 >> A4 Base...
Open factory section →Side Mirror Turn Signal Inoperative (GROUP 94, NO. 12-90)
A4 Premium Plus Quattro, Eng CD CAEB, Automatic Trans
Side Mirror Turn Signal Inoperative (GROUP 94, NO. 12-90) — 2013 Audi A4 Premium Plus Quattro, Eng CD CAEB, Automatic Trans Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowled...
Open factory section →2007-2012
Representative 2007 manual branch for 2007-2012
Attachment - 00 Software Version Management (SVM)
A3 (8PA) L4-2.0L Turbo (BPY)
Attachment - 00 Software Version Management (SVM) — 2007 Audi A3 (8PA) L4-2.0L Turbo (BPY) Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >> Audi >> 200...
Open factory section →Attachment - 00 Software Version Management (SVM)
A3 (8PA) L4-2.0L Turbo (BPY)
Attachment - 00 Software Version Management (SVM) — 2007 Audi A3 (8PA) L4-2.0L Turbo (BPY) Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >> Audi >> 200...
Open factory section →2019-2024
2019-2024- →Factory LED headlights are not user-replaceable — the entire assembly may need replacement
- →Never touch halogen bulbs with bare fingers — skin oil causes hot spots and premature failure
- →LED upgrade bulbs are available but may cause CANBUS errors on some models
- →Replace bulbs in pairs — if one side burned out, the other is likely near end of life
2013-2018
2013-2018- →Factory LED headlights are not user-replaceable — the entire assembly may need replacement
- →Never touch halogen bulbs with bare fingers — skin oil causes hot spots and premature failure
- →LED upgrade bulbs are available but may cause CANBUS errors on some models
- →Replace bulbs in pairs — if one side burned out, the other is likely near end of life
2007-2012
2007-2012- →Never touch halogen bulbs with bare fingers — skin oil causes hot spots and premature failure
- →LED upgrade bulbs are available but may cause CANBUS errors on some models
- →Replace bulbs in pairs — if one side burned out, the other is likely near end of life
2001-2006
2001-2006- →Never touch halogen bulbs with bare fingers — skin oil causes hot spots and premature failure
- →Replace bulbs in pairs — if one side burned out, the other is likely near end of life
1995-2000
1995-2000- →Never touch halogen bulbs with bare fingers — skin oil causes hot spots and premature failure
- →Replace bulbs in pairs — if one side burned out, the other is likely near end of life
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
LED Upgrade Bulbs
Brighter, whiter light for better nighttime visibility.
Replacement Halogens
Standard OEM-spec bulbs for reliable replacement.
Dielectric Grease
Protects electrical connectors from moisture.
Latex-Free Gloves
Avoid fingerprints on the bulb and keep glass clean.
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your Audi A4 so the job is ready when the parts arrive.
Frequently Asked Questions
- What size headlight bulb does a Audi A4 use?
- The Audi A4 headlight bulb size varies by year. Newer models often use factory LED units, while older models use H11, H7, or 9006 halogen bulbs. Check the year-specific specs below for your exact fitment.
- Can I put LED bulbs in my Audi A4?
- If your Audi A4 has halogen headlights, you can install LED replacement bulbs. Look for bulbs with a proper beam pattern (projector-compatible) to avoid blinding other drivers. Some models may need anti-flicker adapters.
- How do I replace the headlight bulb on a Audi A4?
- On most Audi A4 models, you can access the headlight bulb from behind the headlight assembly in the engine bay. Twist the bulb socket counterclockwise, pull out the old bulb, insert the new one (don't touch the glass), and twist back in.
- Why does my Audi A4 headlight keep burning out?
- Frequent bulb burnout on the Audi A4 is usually caused by a loose connection, moisture in the housing, touching the bulb glass during installation, or a voltage regulator issue. Check the connector and housing seal.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-07