Description
Mercedes C118 W177 W247 Rear Left Wheel Speed Sensor Harness is a specialized component from the ABS Wheel Speed Sensor category, designed for precise integration with the anti-lock braking system in Mercedes vehicles. It is responsible for stable signal transmission from the rear left wheel to the control unit, supporting the safe operation of ABS and traction control systems. Thanks to its factory fit, the harness ensures proper cable routing and a secure connection to the sensor and vehicle’s wiring.
Specifications and technical data
- SKU: A2475401100
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A2475401100
- Substitutable numbers: A2475401100, A 247 540 11 00
- Location on the vehicle: Rear, Left
- Category: ABS Speed Sensors
Purpose and Function in the ABS System
The wheel speed sensor harness installed on the rear left axle is responsible for transmitting the signal from the sensor to the vehicle’s electronics. A properly functioning harness:
- enables accurate reading of wheel rotational speed,
- supports correct ABS operation during braking,
- influences the performance of stability and traction control systems,
- reduces the risk of errors and warning lights on the dashboard.
Selecting a harness dedicated to a specific axle and side of the vehicle minimizes installation issues and eliminates the need for wiring modifications.
Benefits of Using an Original Mercedes Harness
Using a component designed for the Mercedes ABS system offers a range of practical benefits:
- Factory Cable Routing – the correct length and shape of the harness facilitate its routing according to original mounting points.
- Stable Connectors – properly fitted terminals reduce the risk of looseness, circuit breaks, and signal interference.
- Compatibility with Vehicle Electronics – the harness works with the factory wheel speed sensor and ABS control unit.
- Restores full braking system functionality after wire damage or mechanical intervention in the wheel arch area.
Installation Characteristics
The component is designed for installation in the rear left wheel area, in the location specifically provided by the vehicle manufacturer. The harness’s appropriate shaping allows for:
- correct positioning of the cable relative to the control arm, hub, and wheel arch,
- maintaining a safe distance from moving suspension components,
- reducing exposure to chafing and mechanical damage.
During installation, it is recommended to check the condition of the wheel speed sensor itself and the mounting points to fully utilize the potential of the newly installed harness.
Condition and Service Application
The product is categorized as used components, allowing for economical ABS system repair while maintaining compatibility with the factory installation. This type of harness is suitable for both resolving circuit break issues with the sensor and for post-accident repairs in the rear left wheel arch area.
If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other parts from the same group, such as wheel sensors, signal cables, or harnesses routed along the suspension, check the available parts in the Mercedes ABS Wheel Speed Sensor category.
Support for Selecting Used Electronics and Sensors
When selecting harnesses and sensors for the ABS system, it is important to pay attention to the compatibility of markings and the wiring configuration in your specific vehicle model. Practical tips on selecting used electronic components, verifying compatibility, and installation can be found in the guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?.
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