Mercedes W204 ABS Sensor Wiring Harness Front Left N/S A2045403710

The Mercedes W204 Front Left ABS Sensor Wiring Harness is an original component of the braking system's electrical installation, designed for mounting on the front left axle of the vehicle. It ensures a stable connection of the ABS sensor to the car's wiring, which translates to the correct operation of the anti-lock braking system and traction control.

Specifications and technical data

• SKU: A2045403710
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045403710
• Substitutable numbers: A2045403710, A 204 540 37 10
• Location on the vehicle: Front, Left
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and Function in the ABS System

The front left ABS sensor wiring harness for the Mercedes W204 is responsible for transmitting the signal from the wheel speed sensor to the ABS/ESP system controller. A properly functioning harness:

• enables precise reading of the front left wheel's rotational speed,
• supports the operation of the ABS system during sudden braking,
• contributes to the correct functioning of the stability control systems,
• reduces the risk of ABS-related errors and warning messages.

Thanks to its dedicated fit for the specific body style, the harness routes the wires in a designed manner, minimizing the risk of chafing and mechanical damage during use.

Construction and Fit for Mercedes W204

This component has been designed specifically for the Mercedes W204 platform, taking into account suspension geometry and factory mounting points. Proper wire routing in the front left wheel area:

• facilitates installation in original brackets and clips,
• ensures a safe distance from moving suspension and brake components,
• limits exposure to dirt and moisture.

Such a fit promotes the maintenance of factory braking system performance parameters and signal stability from the sensor.

Benefits of Using an Original Harness

Using an ABS sensor wiring harness dedicated to the Mercedes W204 helps avoid problems typical of universal aftermarket replacements. Key advantages include:

• compatibility with the electrical system without the need for modifications,
• stable connectors matched to the factory ABS sensor,
• maintaining the correct wire length in the front left wheel area,
• reduced risk of errors in the ABS/ESP controller.

For the user, this means predictable vehicle behavior during braking and less susceptibility to failures resulting from wiring issues.

Product Condition and Service Application

The offered harness is a used part, making it an attractive solution for servicing the ABS system in older Mercedes W204 models. It is particularly useful in situations where the existing harness has suffered mechanical damage, contact corrosion, or insulation chafing in the front left wheel area.

Replacing the ABS sensor wiring harness is recommended, among other things, for:

• recurring front left wheel speed sensor errors,
• visible wire damage during suspension inspection,
• ABS operational problems after replacing the sensor itself.

Extended Service and Additional Materials

If you are planning a comprehensive repair or upgrade of the undercarriage and braking system area in your Mercedes and need other parts from the same group, such as additional harnesses, sensors, or electrical installation components, check the available parts in the Other Mercedes category.

When diagnosing braking systems and comparing solutions used in different brands, it is worth consulting technical materials. For a better understanding of the differences in the construction of sports and standard braking and chassis systems, you can read the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which discusses, among other things, the specifics of advanced braking systems.