Audi A4 B8 Headlight Level Sensor Left N/S Module Leveling Unit 1T0907503A

Description

The Audi A4 B8 Left Headlight Leveling Sensor is a precise module responsible for automatically adjusting the height of the headlights. This factory leveling system component ensures proper cooperation between the headlights and the suspension, resulting in safe and comfortable road illumination.

Specifications and technical data

• SKU: 1T0907503A
• Mark: Audi
• Condition: Used
• OEM Part Number: 1T0907503A
• Substitutable numbers: 1T0907503A, 1T0 907 503 A
• Location on the vehicle: Left
• Category: Headlight Assemblies

Purpose and Function in the Headlight System

The presented sensor is a component of the Headlights category and operates within the automatic headlight leveling system of the Audi A4 B8 generation. It is responsible for transmitting information about the current position of the vehicle body relative to the road surface to the control unit, allowing the headlights to maintain a stable illumination line regardless of vehicle load or driving conditions.

Its placement on the left side of the vehicle allows for precise mapping of suspension movements in this area, which is crucial for the correct operation of the entire leveling system. A properly functioning sensor reduces the risk of dazzling other road users and improves visibility in front of the vehicle.

Module Construction and Vehicle Integration

The leveling module works with the factory electrical system of the Audi, creating a cohesive system with the headlights and the light control unit. The design allows for:

• accurate reading of suspension position changes on the left side,
• stable signal transmission to the headlight control unit,
• compliance with factory mounting points in the Audi A4 B8.

Thanks to this, the sensor, after correct installation, can operate continuously, reacting to dynamic changes in the vehicle body’s position during acceleration, braking, or driving with a load.

Benefits of Using an Original Audi Module

Using an original leveling sensor in the Audi A4 B8 provides a range of practical operational benefits:

• High Mounting Compatibility – fits factory brackets and wiring harnesses without modifications.
• Stable Headlight System Operation – correct functioning of automatic headlight leveling under various load conditions.
• Reduced Lighting System Errors – the correct module minimizes the risk of error messages related to leveling.

This solution is particularly recommended for diagnosing problems with uneven light patterns, lighting system errors, or after suspension repairs on the left side.

Item Condition and Service Application

The offered sensor is a used part, sourced from disassembly, intended for service applications in the Audi A4 B8. It can be used for standard replacement of a damaged module as well as for comprehensive restoration of the headlight leveling system after a collision or suspension repairs.

Selecting the correct leveling module is important for driving safety. Therefore, before installation, it is recommended to verify compatibility with the specific vehicle equipment version and perform system adaptation if required by Audi service procedures.

Related Parts and Additional Information

If you are planning a comprehensive repair or upgrade of the front lighting area in your Audi and need other parts from the same group, such as headlights, control modules, or position sensors, check the available parts in the Audi Headlights category.

For users interested in the broader context of operating diesel-powered cars and the costs of used parts, an article comparing popular BMW engines may be useful – you can find it here: BMW N47 vs M57 / M57N / M57N2 – Ranking of Legendary Diesels.