Audi A4 B8 Speed Sensor Rear Left N/S Wheel Brake ABS Cable 4E0927803F

Audi A4 B8 Speed Sensor Rear Left N/S Wheel Brake ABS Cable is a safety system component responsible for the precise reading of the rotational speed of the rear left wheel. Thanks to this sensor, the ABS system can effectively control braking force, improving vehicle stability and shortening braking distances in critical situations. This solution is designed for users who expect efficient braking system operation and proper integration with Audi's onboard electronics.

Specifications and technical data

• SKU: 4E0927803F
• Mark: Audi
• Condition: Used
• OEM Part Number: 4E0927803F
• Substitutable numbers: 4E0927803F, 4E0 927 803 F, 0 265 007 929
• Location on the vehicle: Rear, Left
• Category: ABS Speed Sensors

Function and application of the ABS speed sensor

The wheel speed sensor mounted on the rear left axle works with the pulse ring and the ABS controller, transmitting a signal regarding the current rotational speed of the wheel. Based on this data, the system:

• prevents wheel lock-up during emergency braking,
• supports driving stability in emergency situations,
• enables the correct operation of systems linked to ABS (e.g., traction control, electronic stability control – if present in the vehicle),
• reduces wear on friction components by distributing braking forces more evenly.

Selecting the correct sensor for the specific side and axle of the vehicle is crucial for the proper operation of the entire braking system and avoiding controller errors.

Compatibility and OEM selection

The presented sensor belongs to the ABS Speed Sensor category and is intended for installation in Audi models that were factory-equipped with this type of solution on the rear left side. When selecting the component, it is recommended to verify compatibility using the OEM number and compare the placement on the vehicle with the original component removed from the car.

To avoid compatibility issues, it is worth:

• checking the compatibility of markings with service documentation or parts catalogs,
• comparing the shape, cable length, and connector type with the currently installed sensor,
• verifying that the sensor is specifically designed for the rear left side of the vehicle.

This approach minimizes the risk of ABS errors appearing on the dashboard and ensures stable cooperation with the vehicle's electronics.

Installation characteristics – rear left

The placement on the vehicle defined as rear left means that the sensor operates in a demanding environment – near suspension and brake components, exposed to dirt, moisture, and temperature changes. For this reason, during installation, it is worth paying attention to:

• correct routing of the cable in the factory guides,
• precise seating of the sensor in the hub or steering knuckle socket,
• cleanliness of mounting surfaces and the absence of metal filings near the pulse ring,
• secure connection of the plug into the electrical harness.

Careful installation translates into a stable sensor signal, lack of interference, and a lower risk of ABS faults reappearing after replacement.

Why choose a used Audi ABS sensor

A used wheel speed sensor is a solution that allows for reduced repair costs while maintaining compliance with Audi's factory specifications. A component sourced from the disassembly of an original system:

• retains factory geometry and connector type,
• is matched to the electrical installation of a specific vehicle generation,
• enables the restoration of correct ABS system operation without the need for harness modifications.

This is a practical solution for users who want to quickly clear ABS errors, restore full functionality of the braking system, and simultaneously maintain reasonable service costs.

More about used electronics and sensors

If you want to better understand how to safely select and install used sensors and electronic modules, it is worth checking out practical tips. Detailed information on selection by VIN/OEM, hardware and software compatibility, and common problems can be found in the Global Parts guide: Used automotive electronics – ECU modules and second-hand sensors.

If you are planning a comprehensive repair or upgrade of the braking zone in your Audi and need other elements from the same group, such as additional sensors, signal cables, or sensor mounts, check the available parts in the Audi ABS Speed Sensor category.