Audi R8 Laser Headlights 4S0 941 085 F 4S0941085F

Part Number: 4S0 941 085 F (4S0941085F) Generation: Gen 2 (4S) Facelift / Performance Position: Left Hand Side (Driver Side for LHD / Passenger Side for RHD)

The 4S0 941 085 F is a high-end Full LED Headlight with Audi Laser Light technology, designed specifically for the second-generation (4S) Audi R8. These units are standard on the V10 Performance models and optional on the standard V10. They are characterized by the blue-tinted glass “X” elements within the housing and the advanced matrix beam capabilities.

Technical Specifications

• Compatibility: Audi R8 Coupe/Spyder (4S Facelift) 2019–2023.

• Lighting Technology: * Low Beam: High-intensity LED Matrix.

  • High Beam: Combined LED and Laser Spot.

  • DRL: Integrated LED signature with dynamic startup sequence.

  • Indicators: Dynamic (sequential) “sweeping” LED signals.

• Laser Module: Features 4 high-power laser diodes per unit, producing a light cone that reaches up to 600 meters.

Key Performance Features

• Double the Range: The laser high-beam supplement provides nearly twice the illumination distance of standard LED high beams, activating only above 60 km/h (37 mph) in dark conditions where no other vehicles are detected.

• Matrix LED Technology: Utilizes 37 individual LEDs per headlight that can be dimmed or turned off independently. This allows the car to keep high beams on while “masking” out oncoming traffic to prevent dazzling other drivers.

• 5,500K Color Temperature: The laser light passes through a phosphorus converter to create a pure white light that mimics daylight, significantly reducing eye fatigue during night driving.

• Blue Light Signature: A distinct blue illumination inside the housing serves as a visual identifier for the Laserlight option, even when the lights are off.

Professional Installation & Cataloging Notes

1. Module Configuration: This is a “Mechatronic” assembly. A complete unit requires several control modules (Ballasts/Drivers) usually mounted on the rear and bottom of the housing. If purchasing a bare housing (without modules), ensure you source the correct FLM (Flexible Lighting Module) to match the Laserlight software.

2. Coding and Adaptation: These units are not “plug-and-play.” They require online coding via Audi ODIS to be paired with the vehicle’s VIN and Body Domain Controller. Without this, the Laser and Matrix functions will remain inactive.

3. LHD vs. RHD: Part number 4S0 941 085 F is specifically for the Left side. Note that Audi uses different beam-forming masks for Left-Hand Drive (USA/Europe) and Right-Hand Drive (UK/Japan) markets. Verify the specific region suffix to ensure the beam cut-off is legal for your territory.

4. Heat Management: Laser diodes generate significant heat. The housing includes internal fans and specialized heatsinks. When inspecting a used unit, ensure the cooling fans are unobstructed and the rear vent caps are intact to prevent moisture ingress.

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