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Used for: Fog Light Bulb Front
Used for: Fog Light Bulb Front
Used for: Headlight Bulb High Beam(Avant), Headlight Bulb Low Beam(Avant, with halogen headlights)
Used for: Headlight Bulb High Beam(Cabriolet, with halogen headlights)
Used for: Headlight Bulb Low Beam(Avant, with HID headlights)
Used for: Headlight Bulb Low Beam(Cabriolet, with HID headlights)
Used for: Back Up Reverse Light Bulb, Daytime Running Light Bulb(Avant)
Used for: Brake Light Bulb(Avant), Side Marker Light Bulb Rear(Compare to original - Option 2), Tail Light Bulb(Compare to original - Option 2)
Used for: Brake Light Bulb(Cabriolet), Tail Light Bulb(Compare to original - Option 1)
Used for: Daytime Running Light Bulb(Base), Parking Light Bulb(Avant, Compare to original - Option 1), Stepwell Light Bulb, Courtesy Light Bulb(Avant), Glove Box Light Bulb, Interior Door Light Bulb, Trunk or Cargo Area Light(Cabriolet)
Used for: Daytime Running Light Bulb(Base), Parking Light Bulb(Avant, Compare to original - Option 1), Stepwell Light Bulb, Courtesy Light Bulb(Avant), Glove Box Light Bulb, Interior Door Light Bulb, Trunk or Cargo Area Light(Cabriolet)
Used for: License Plate Light Bulb, Courtesy Light Bulb(Cabriolet, Compare to original - Option 2), Trunk or Cargo Area Light(Avant), Vanity Mirror Light Bulb
Used for: Parking Light Bulb(Avant, Compare to original - Option 2), Side Marker Light Bulb Front, Turn Signal Light Bulb Front Inner
Used for: Side Marker Light Bulb Rear(Compare to original - Option 1)
Used for: Turn Signal Light Bulb Front Outer
Used for: Turn Signal Light Bulb Rear
Used for: Dome Light Bulb, Engine Compartment Light Bulb
Used for: Dome Light Bulb, Engine Compartment Light Bulb
Used for: Map Light Bulb
This 2004 Audi S4 bulb size guide is designed to help you verify the correct bulb by lighting position, so you can match the right part to the right lamp before you buy. Because the S4 could be equipped with different body styles and lighting packages, the bulb list may vary between Avant, Cabriolet, and other market-specific setups.
Use this page as a quick reference for exterior, interior, and cargo-area lighting on the 2004 Audi S4. From headlights and fog lights to license plate, dome, map, and courtesy lamps, the chart below helps narrow down the bulb size for each location on the car.
Fitment can change with trim, package, and headlight type, so always confirm whether your 2004 Audi S4 uses halogen or HID lighting before ordering. Aftermarket LED upgrades may fit physically but still need the correct base and may not work well with every housing or reflector. Some conversions can also trigger bulb-out warnings or change beam pattern, especially in headlamps and fog lamps. The safest approach is to check the bulb already installed in your car, compare it with the chart, and replace it with the same size unless you are intentionally upgrading and know the compatibility details.
The chart lists D1S for the Avant low beam when equipped with HID headlights.
The Cabriolet with HID headlights uses a D2S low beam bulb.
The Avant high beam bulb is listed as H7.
The Cabriolet with halogen headlights uses an H9 high beam bulb.
The front fog light bulb is listed as H11 LED or H16 LED, depending on the setup shown in the chart.
The front outer turn signal bulb is 2827, and the front inner turn signal bulb is 3457A.
The rear turn signal bulb is listed as 7507.
The license plate light bulb is 6418.
The dome light uses 6411 or 6428, and the map light is listed as 64111.
Those interior locations are listed with 2825 or 98 bulbs.
The back up reverse light bulb is 7506.
The Avant daytime running light bulb is listed as 7506.
The Avant brake light bulb is 7528, and the tail light bulb is also listed as 7528 for one of the chart options.
Yes. The chart shows different bulbs for the Avant and Cabriolet in several positions, including low beams, cargo-area lights, courtesy lights, and brake or tail lamps.
Yes. Because trim, market, and lighting package differences can affect fitment, checking the bulb already installed in your 2004 Audi S4 is the best way to confirm the correct replacement.