2003 Audi A4 Bulb Sizes
Quick answer: the 2003 Audi A4 uses D2S or D1S or H7 low beams, H9 or H7 high beams, H11 or H16 fog lights and 7225 or 7528 brake lights. Where two sizes are listed, it depends on your trim or headlight type, so check the chart below.
2003 Audi A4 bulb size chart
| Position | Bulb size (tap to shop) |
|---|---|
| Fog Light Bulb Front | H11 |
| Fog Light Bulb Front | H16 |
| Headlight Bulb Low Beam(Cabriolet, with HID headlights) | D2S |
| Headlight Bulb High Beam(Cabriolet, with halogen headlights) | H9 |
| Headlight Bulb Low Beam(Base, with HID headlights) | D1S |
| Headlight Bulb Low Beam(Base, with halogen headlights) | H7 |
| Headlight Bulb High Beam(Base) | H7 |
| License Plate Light Bulb | 6418 |
| Parking Light Bulb | 2825 |
| Parking Light Bulb | 98 |
| Tail Light Bulb | 7225 |
| Daytime Running Light Bulb | 2825 |
| Daytime Running Light Bulb | 98 |
| Turn Signal Light Bulb Rear | 7507 |
| Back Up Reverse Light Bulb | 7506 |
| Side Marker Light Bulb Front | 3457A |
| Side Marker Light Bulb Rear | 5007 |
| Stepwell Light Bulb | 2825 |
| Stepwell Light Bulb | 98 |
| Turn Signal Light Bulb Front Outer | 2827 |
| Turn Signal Light Bulb Front Inner | 3457A |
| Brake Light Bulb(Cabriolet) | 7225 |
| Brake Light Bulb(Base) | 7528 |
| Vanity Mirror Light Bulb | 6418 |
| Glove Box Light Bulb | 2825 |
| Glove Box Light Bulb | 98 |
| Dome Light Bulb | 6411 |
| Dome Light Bulb | 6428 |
| Map Light Bulb | 64111 |
| Interior Door Light Bulb | 2825 |
| Interior Door Light Bulb | 98 |
| Engine Compartment Light Bulb | 6411 |
| Engine Compartment Light Bulb | 6428 |
| Courtesy Light Bulb(Base) | 2825 |
| Courtesy Light Bulb(Base) | 98 |
| Trunk or Cargo Area Light(Cabriolet) | 2825 |
| Trunk or Cargo Area Light(Cabriolet) | 98 |
| Courtesy Light Bulb(Cabriolet, Compare to original - Option 2) | 6418 |
| Trunk or Cargo Area Light(Base) | 6418 |
Tap any bulb size to see it on Amazon. Trims and mid-year changes can differ, so pull the old bulb and match the number on its base before you order.
Which bulb should I buy?
- Just need it working again? Buy the standard halogen in the same size. It's cheap, it's legal everywhere, and it takes five minutes.
- Want to see better at night without messing with anything? Step up to a brighter halogen. Same plug, more light, no wiring.
- Want the white, modern look? Go LED. Great for fog, reverse, plate and interior lights. For headlights, LED bulbs in a housing built for halogen can throw glare, so aim them after you install and check your state's rules before running them on the street.
Our picks by bulb size
H11 (fog light front)
H16 / H9 (fog light front, headlight high beam)
D2S (headlight low beam)
D1S (headlight low beam)
- Top pick: Torchbeam D1S HID bulbs
H7 (headlight low beam, headlight high beam)
- Top pick: Sylvania H7 XtraVision halogen (2 bulbs)
6418 (license plate light, vanity mirror light, courtesy light and more)
- Top pick: AUXLIGHT 6418/6411 36mm festoon LED
2825 (parking light, daytime running light, stepwell light and more)
- Halogen: Sylvania 194 SilverStar (2 bulbs)
- LED: LASFIT 194 LED (2 pcs)
98 (parking light, daytime running light, stepwell light and more)
- Top pick: #89/98 miniature LED replacement bulb
7225 (tail light, brake light)
- Top pick: Sylvania 7225 Long Life miniature bulb
7507 (turn signal light rear)
- Top pick: Sylvania 7507 Long Life (2 bulbs)
7506 (back up reverse light)
- Top pick: Sylvania 7506 SilverStar (2 bulbs)
3457A (side marker light front, turn signal light front inner)
- Top pick: Sylvania 3457A Long Life amber (2 bulbs)
5007 (side marker light rear)
- Top pick: Sylvania 5007 Basic (2 bulbs)
2827 (turn signal light front outer)
- Top pick: Rossesay 2827/2825 bulbs
7528 (brake light)
- Top pick: Sylvania 7528 SilverStar (2 bulbs)
6411 (dome light, engine compartment light)
- Top pick: Lanuovx 6411 festoon bulbs (10 pack)
6428 (dome light, engine compartment light)
- Top pick: 31mm festoon LED (fits 6428/DE3175)
64111 (map light)
- Top pick: PHINLION BA9S LED bulbs (2 pack)
For brake lights and turn signals, match the LED color to the lens: red behind a red lens, amber for turn signals.
While you're in there
- Cloudy headlights? New bulbs won't fix a yellowed lens. A replacement housing makes a bigger difference than any bulb: see Audi A4 headlights at NTXGlow.
- Tail lights faded or cracked? Audi A4 tail lights at NTXGlow.
Common questions
What size is the low beam headlight bulb on a 2003 Audi A4?
Headlight Low Beam(Cabriolet, with HID headlights): D2S. Headlight Low Beam(Base, with HID headlights): D1S. Headlight Low Beam(Base, with halogen headlights): H7.
What size is the high beam headlight bulb on a 2003 Audi A4?
Headlight High Beam(Cabriolet, with halogen headlights): H9. Headlight High Beam(Base): H7.
What size is the fog light bulb on a 2003 Audi A4?
Fog Light Front: H11. Fog Light Front: H16.
Are the brake light and tail light the same bulb on a 2003 Audi A4?
No. The brake light is a 7225 or 7528 and the tail light is a 7225.
Can I put LED bulbs in a 2003 Audi A4?
Most sizes on this vehicle have a plug-in LED version. Fog, license plate and interior lights are the easy wins. For headlights, aim them after you install and check your local laws first. Some trims of this vehicle use HID (D-series) headlight bulbs. Replace those with the same HID size, not an LED.
How do I make sure I'm buying the right size?
Pull the old bulb and read the number stamped on its base, or check the bulb chart in your owner's manual. Trims and mid-year changes can differ from any chart, including this one.
Other Audi A4 years
2005 Audi A4 bulb sizes · 2006 Audi A4 bulb sizes · 2009 Audi A4 bulb sizes
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