In short, the 2011 Audi A4 S Line uses either D3S xenon bulbs for HID headlights or standard halogen bulbs (H7 for low beam and H1 for high beam); fog lights typically use H11. Your exact configuration depends on trim and market, so verify on the car.
Understanding the headlight options for the 2011 A4 S Line
Across markets, the A4 B8/8K generation offered different headlight setups. The S Line package often paired with Xenon/HID headlights, but halogen variants were also available in some regions. The following sections break down what to buy based on which headlight system your car has.
Halogen headlights
Halogen-equipped A4 S Line headlights use replaceable bulbs with standard socket types. If your car is halogen-equipped, the replacement bulbs you typically need are:
- Low beam: H7 (55W)
- High beam: H1 (55W)
- Fog lights: H11 (55W)
Note: Bulb part numbers can vary by market and year; consult the owner's manual or a parts catalog to confirm exact bulb sizes before purchasing.
Xenon HID headlights (Bi-Xenon)
Xenon headlamps require bulbs that are matched to the ballast system. The common bulb type for 2011 A4 S Line Xenon headlights is:
- D3S 35W HID bulb for the main headlights (low and high beam via the ballast)
- In some rare or market-specific configurations, D1S bulbs may appear, but D3S is the standard for this model year
Note: With HID setups, you replace only the bulb, not the ballast, and the headlight assembly may include a separate ballast or an integrated unit. Always ensure compatibility with your specific ballast and housing when purchasing replacements.
LED or other headlight options
For the 2011 A4 S Line, LED headlights were not a standard OEM option in most markets. Some regions offered LED daytime running lights or optional LED-based headlamps, but the main bulbs would still involve HID or halogen units. If your car has LED headlights, the bulbs are typically not user-replaceable in the same way as halogen or HID bulbs; the entire headlight module is often replaced or serviced as a unit.
How to identify which headlights you have
To confirm the bulb type you need, use these identification tips:
- Check the exterior headlight design: xenon/HID headlights typically have a brighter, bluish hue and may include a projector lens and a ballast housing nearby.
- Look for a ballast in the engine bay or integrated into the headlight housing—presence usually indicates HID/Xenon.
- Consult the car’s owner's manual or a VIN-based build sheet to see whether Xenon or halogen headlights were installed at factory.
- Physically inspect the bulb socket inside the headlight access panel; the socket shape will indicate H7, H1, D3S, etc.
If you’re replacing bulbs yourself, always disconnect the battery, follow the vehicle’s service manual steps for headlight access, and use the correct wattage and type to preserve the headlamp electronics.
Summary
The 2011 Audi A4 S Line offers two primary headlight configurations. Xenon HID headlights use D3S bulbs and require ballast-compatible handling, while halogen headlights use standard bulbs such as H7 for low beams, H1 for high beams, and H11 for fog lights. LED-equipped versions, if present, usually do not permit bulb-level replacements and may require module-level service. Always verify your specific build—via manual, VIN, or a parts database—before purchasing bulbs to ensure proper fit and safety.
Do I need H11 or 9005?
H11 bulbs are designed for use as low beam headlights, while 9005 bulbs are typically used for high beams. This results in a higher brightness level for the 9005 bulbs compared to the H11 bulbs.
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Does the 2011 Audi A4 Prestige come with xenon HID headlights?
About 2011 Audi A4 Headlights
Two primary configurations exist for this model year: halogen and xenon (also known as High-Intensity Discharge or HID). Halogen setups are standard on base trims, while higher trims like the Premium Plus and Prestige include bi-xenon projectors.
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Is the Audi A4 5x112?
Regardless of whether you choose 16-inch steel wheels or 15-inch alloy wheels, the bolt pattern remains consistent at 5x112 mm.
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What headlight bulb does an Audi A4 use?
Bosch H7 (477) Pure Light Headlight Bulbs - 12 V 55 W PX26d - 2 Bulbs.
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