Mercedes Vito W447 Rear ABS Speed Sensor Unit Wire Cable Left N/S A4479056802

Mercedes Vito W447 Rear ABS Speed Sensor Unit Wire Cable Left N/S is an original traction control system component designed for the rear left axle of the vehicle. As part of the ABS speed sensor group, it is responsible for precise wheel speed readings and transmitting data to the ABS and electronic stability control systems. Using this OEM component allows for a technically correct repair without interfering with the factory architecture of the braking system.

Specifications and technical data

• SKU: A4479056802
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4479056802
• Substitutable numbers: A4479056802, A 447 905 68 02, A4479058807, A 447 905 88 07
• Location on the vehicle: Rear, Left
• Category: ABS Speed Sensors

Purpose and function in the ABS system

The presented sensor is dedicated to installation on the rear left side of the vehicle, where it monitors wheel rotation speed and communicates with the ABS control module. A properly functioning component of this type:

• ensures stable operation of the anti-lock braking system during emergency braking,
• supports the operation of traction control and electronic stability control systems,
• reduces the risk of uneven braking resulting from incorrect wheel speed readings.

By maintaining factory signal characteristics, the sensor works seamlessly with the original electrical installation and vehicle electronics, which is crucial for proper diagnostics and the operation of safety systems.

Benefits of using an original Mercedes sensor

Using an original sensor in a Mercedes Vito W447 allows for maintaining the consistency of the entire braking system's operating parameters. In practice, this means:

• maintaining factory activation thresholds for ABS and driver assistance systems,
• proper compatibility with the existing electrical harness and connectors,
• easier computer diagnostics – the controller recognizes the component as compliant with the factory configuration.

A used OEM component is a solution that combines technical correctness with a more cost-effective repair compared to a new part, while maintaining the correct operating characteristics.

Selection, installation, and diagnostics

To ensure trouble-free installation, it is worth verifying the sensor's compatibility with your specific vehicle version before purchase, using the OEM part number or catalog data. A correctly selected component for the rear left side of the vehicle:

• allows for installation in existing mounting points without modifications,
• ensures proper cable routing and correct positioning relative to the impulse ring,
• minimizes the risk of ABS errors reappearing after the repair.

After installation, it is recommended to perform computer diagnostics to clear stored errors and verify current sensor operating parameters, which will confirm the effectiveness of the repair and signal stability.

Application area and system expansion

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other elements from the same group, such as additional axle sensors, signal cables, or components working with the traction control system, check the available parts in the Mercedes ABS speed sensor category.

How to safely choose used electronics and sensors

When selecting a used ABS speed sensor, it is worth paying attention to the compatibility of markings, versions, and the intended axle and side of the vehicle. A detailed discussion of selection principles, including working with OEM numbers, compatibility issues, and practical installation examples, can be found in the guide: Used automotive electronics – ECU modules and second-hand sensors.

If you want to further optimize service costs while maintaining an appropriate level of safety, the material describing strategies for saving on used parts may also be helpful: how to reasonably use second-hand car parts.