Mercedes W204 Wheel ABS Speed Sensor Front Left Right N/O/S Cable A2049052905

Mercedes W204 Wheel ABS Speed Sensor Front Left Right N/O/S Cable is a precision safety system component responsible for accurately reading the rotational speed of the front wheels. Thanks to the correct signal from the sensor, the ABS system can effectively stabilize the vehicle during braking, supporting the operation of advanced onboard electronics. This solution is designed for users who expect a proven component with factory-fit compatibility for the Mercedes C-Class W204 generation braking system.

Specifications and technical data

• SKU: A2049052905
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049052905
• Substitutable numbers: A2049052905, A 204 905 29 05
• Location on the vehicle: Front, Left, Right
• Category: ABS Speed Sensors

Purpose and function in the ABS system

The ABS speed sensor in the Mercedes W204 is responsible for generating a wheel speed signal, which is then analyzed by the brake system controller. A properly functioning component allows for:

• maintaining driving stability during emergency braking,
• reducing wheel slippage on slippery surfaces,
• cooperation with other safety systems, such as traction control or electronic stability control.

As a result, the ABS system in the Mercedes can react quickly and predictably, which translates into a higher level of safety for the driver and passengers.

Vehicle placement and fitment

The presented sensor is designed for installation on the front axle, with the possibility of use on both the left and right sides. This solution simplifies part selection and allows for flexible use of the component during brake system maintenance.

Proper fitment to the suspension and hub design in the Mercedes W204 ensures:

• stable seating in the mounting socket,
• correct positioning relative to the impulse ring,
• proper routing of the signal cable in the wheel arch area.

A Mercedes W204 Wheel ABS Speed Sensor Front Left Right N/O/S Cable configured in this way minimizes the risk of reading interference and allows for maintaining factory operating parameters of the system.

Characteristics of the used component

The offered item comes from the used parts group, which represents a reasonable compromise between repair costs and maintaining the vehicle's original specifications. In the case of electronics and measuring elements for safety systems, it is particularly important that the component is structurally compatible with the manufacturer's factory solution.

Choosing a used ABS sensor for the Mercedes W204 is a common practice in professional workshops, especially during comprehensive brake system repairs, where both quality and operational economy matter. Additional tips on making informed choices regarding electronics and measuring components can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses the practical aspects of using pre-owned components.

Application in service practice

Replacing the ABS speed sensor in a Mercedes W204 is a typical service operation performed when:

• ABS or ESP system errors appear,
• the brake system operates unevenly at low speeds,
• the cable or sensor body is damaged due to corrosion or mechanical interference.

Selecting the right component from the Mercedes W204 Wheel ABS Speed Sensor Front Left Right N/O/S Cable category allows for restoring proper cooperation between the wheel, the impulse ring, and the controller, without the need to interfere with other system elements.

Expanding Mercedes ABS system service

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 front axle sensors, rear axle sensors, or compatible measuring elements, check the available parts in the Mercedes ABS speed sensor category.