2003 Audi A4 Headlight Bulb Size
The 2003 Audi A4 headlights have a single bulb size (H7) for high and low beams.
Using the 2003 Audi A4 bulb chart below, you can quickly identify the correct replacement lamp for all 40 positions of its lighting system.
Fog Light Bulb Front - H11 LED
Fog Light Bulb Front - H16 LED
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
Center High Mount Stop Light Bulb - LED
“LED” means it is impossible to replace the bulb. Need to change the whole unit.
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
Replacement Bulb Size for the 2003 Audi A4
Considering an upgrade from the Halogen to LED or HID headlights? Find below aftermarket replacements for OEM bulbs compatible with the 2003 Audi A4's housing. Note that you may need additional equipment to install LED or Xenon bulbs despite the correct bulb size of the lamp.
2003 Audi A4 Fog Light bulb size - H11 LED
LED Lights
- See The Difference - The newest Japanese CSP LED chips create +500% more brightness and +250% better night vision than your original halogen or...
Product review
The new generation of LED lights is here to make your nighttime safer and more enjoyable. The brighter they glow, the better! These bulbs will...
Product review
2003 Audi A4 Low Beam bulb size - D2S
LED Lights
Each all-in-one LED conversion light lamp features mute fan cooling, D2S and D2R HID Ballast compacompatibility Operating voltage same as the D2 Xenon bulb, CanBus...
Product review
Xenon HID Conversion Kit
100% Quartz Anti-UV Glass, Excellent in Performance. Up to 3800 Lumens - Brighter than Original Standard HID Bulb. High-Quality Xenon Gas and APL pills, Tungsten...
Product review
– Maximum Performance xenon bulb
– Up to 200% more brightness than standard
– Light beam up to 250 metres in length
– Road legal...
Product review
2003 Audi A4 High Beam bulb size - H9
LED Lights
Introducing the Laxmas H9 LED Headlight Bulb, a cutting-edge solution for your automotive lighting needs.
- Light Source Type: Crafted using high-quality LED technology, these bulbs are...
Product review
Experience a new level of brightness with the H9 NOVSIGHT LED Headlight Bulbs. Equipped with advanced CSP chips, these bulbs deliver a staggering 900% increase...
Product review
2003 Audi A4 Low Beam bulb size - D1S
LED Lights
2 x Epistar LED Chips are specially designed to have focused and wider beam to fit DOT required high or low beam pattern of original...
Product review
Product Key Features:
- IP67 Waterproof Rate
With excellent waterproof and dustproof performance, it can work normally in bad weather with rain, snow, and fog to ensure your...
Product review
Xenon HID Conversion Kit
–DOT approved, 100% legal for On/Off road use
– Extremely Long Life with precise light distribution & consistent performance.
ONLY Upgrade version Osram HID bulbs such...
Product review
Popular Headlights
Explore the custom LED headlight kits that will improve the visibility ahead of the 2003 Audi A4 at night. Made of quality materials, bright and long-lasting, they would be a perfect alternative to old or dimmed factory headlights. Explore more headlights for Audi A4 2003 here.
Popular Taillights
A pair of custom tail lights is necessary if the people behind your 2003 Audi A4 are to be impressed. Consider direct bolt-on replacements powered by LED instead of worn-out or damaged tail lights.
Audi A4 2003 bulb size chart specifies the recommended bulb part numbers and types for all positions of its lighting system, like headlights, fog lights, brake lights, side markers, etc.
If you want to upgrade the headlights, the aftermarket bulb you select has to be the exact size your Audi A4 2003 requires to fit into the housing and match the wattage and voltage specifications.
LightningLab project pulls information about the 2003 Audi A4 bulb sizes from the vehicle's manual and leading automotive lighting suppliers. All the data is classified and fact-checked by our editorial team.
The following chart with the 2003 Audi A4 bulb sizes is provided for informative purposes only. Consult the owner's manual or contact the dealership to double-check the correct bulb type, wattage, voltage, and whether it requires any additional equipment or modifications to be installed on the specific 2003 Audi A4 trim.
Ensure the bulb is "DOT" compliant to avoid legal issues.
FAQs
How to replace the 2003 Audi A4 headlight bulb?
First things first, you'll need the right 2003 Audi A4 bulb size. Of course, you may consult the owner's manual, but let's be honest, that's as dull. Instead, just look at the chart above or remove the old bulb to see its size. It's not rocket science; it's more like... bulb science.
Follow the simple step-by-step instructions:
- 1) Park the 2003 Audi A4 on an even surface and turn off the ignition.
- 2) Open the hood and pop it up.
- 3) Pull the lock bar up and out of the clip to fix the hood.
- 4) Identify the back of the headlight assembly where the bulb is housed.
- 5) You may need to remove other components to access it.
- 6) Locate the electrical connector at the back of the headlight compartment.
- 7) Press down on the locking tab and pull the connector away from the bulb.
- 8) Remove the Old Bulb. Depending on your trim, you may need to:
- a) Unscrew a retaining ring
- b) Unclip a metal pin
- c) Rotate the bulb counterclockwise
- 9) Insert the new bulb without touching the glass.
- 10) Plug the electrical connector back, making sure it clicks into place.
- 11) Turn on the headlights to test the new bulb.
- 12) You may need to aim your headlights.
Reviewed by Brent Ordway
Brent Ordway is an ASE-certified car technician. He has been working on cars since he was a teenager and loved helping people keep their vehicles running smoothly. Brent's skills as a mechanic are unrivaled. In 2022, he earned his place on the list of winners for the ASE Master Automobile Technician of the Year award.
Follow me
Audi A4 Bulb Chart By Years
By clicking the link you will be redirected to Amazon. The aftermarket bulbs & headlights below may improve the illumination of your vehicle and make it stand out from the crowd.
Lightninglab.org is reader-supported. When you buy through links on our site, we may earn an affiliate commission.