Mercedes W204 Wheel ABS Speed Sensor Front Left Right Cable AMG A2049057902

Mercedes W204 Wheel ABS Speed Sensor Front Left Right Cable AMG is a precision component responsible for reliable wheel speed readings. This front sensor with cable harness works with both the left and right wheels, ensuring stable operation of the ABS system and driving safety assistance systems. Thanks to the original design intended for Mercedes models, the component maintains factory performance parameters and correct installation fitment.

Specifications and technical data

• SKU: A2049057902
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049057902
• Substitutable numbers: A2049057902, A 204 905 79 02, BG
• Location on the vehicle: Front, Left, Right
• Category: ABS Speed Sensors

Purpose and function in the braking system

The presented wheel speed sensor is a component of the anti-lock braking system, responsible for transmitting information about the rotational speed of the front wheels to the controller. Mounted on the front axle, it supports both the left and right sides, which allows for signal consistency throughout the system. A properly functioning ABS sensor supports:

• maintaining vehicle control during emergency braking,
• stable operation of the ABS system in various road conditions,
• the operation of related electronic systems that use the wheel speed signal.

Thanks to the dedicated cable harness, the sensor is ready for direct connection to the vehicle's electrical system, which facilitates service and reduces the risk of installation errors.

Compatibility with Mercedes W204 AMG

The offered component has been designed for the Mercedes C-Class W204 generation models, including AMG versions, where precise braking system operation is required under higher operating loads. Using an original solution dedicated to a specific body platform allows for maintaining:

• the correct position of the sensor relative to the pulse ring,
• the appropriate length and routing of the cable within the wheel arch and steering knuckle,
• consistency with the vehicle's factory electrical architecture.

Such a fit minimizes the risk of signal interference and problems with ABS system diagnostics after replacing the component.

Performance characteristics and installation

As a used component, the ABS wheel speed sensor is a sensible choice in situations where it is important to combine functionality with repair cost optimization. The original design with the cable allows for installation in place of the factory component without the need for system modifications. In practice, this means:

• maintaining the factory mounting method on the steering knuckle and in the wheel arch,
• a compatible electrical connector matched to the vehicle's harness,
• the ability to verify correct operation using standard diagnostic procedures.

Before installation, it is recommended to check the plug socket and the condition of the cable in the vehicle to ensure a stable electrical connection and avoid further interference with the system.

Benefits of using an original ABS sensor

Using an original wheel speed sensor in a Mercedes W204 translates into consistent braking system operation and predictable vehicle behavior in emergency situations. Compared to replacements, the component from the same model family offers:

• signal parameters consistent with the controller's requirements,
• a lower risk of ABS errors related to incorrect speed readings,
• easier identification in computer diagnostics thanks to factory markings.

For users who are considering using electronics from the secondary market, additional information on the selection and verification of such components may be useful – you can find them in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Expanding Mercedes ABS system service

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