Mercedes W211 C219 Wheel ABS Speed Sensor Front Left Right N/O/S A2115402317

Mercedes W211 C219 Wheel ABS Speed Sensor Front Left Right is a precision braking system component responsible for the accurate reading of wheel rotational speed on the front axle. As an original Mercedes component, it ensures stable cooperation with the factory ABS and traction control systems, which translates into predictable vehicle behavior during braking. This is a solution for users who expect a technically matched sensor for a specific axle and side of the vehicle.

Specifications and technical data

• SKU: A2115402317
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115402317
• Substitutable numbers: A2115402317, A 211 540 23 17, A 211 540 13 17, A2115401317, A 211 540 18 17, A2115401817, A 211 540 29 17, A2115402917, A 211 540 29 17 64, A211540291764
• Location on the vehicle: Front, Left, Right
• Category: ABS Speed Sensors

Purpose and function of the ABS speed sensor

The presented ABS speed sensor component operates on the front axle, supporting both the left and right sides. Its task is to generate a wheel rotational speed signal, which is then sent to the braking system controller. Based on this data, the ABS system can modulate the pressure in the brake circuit, limiting wheel lock-up and improving vehicle stability on slippery surfaces.

A properly selected sensor is crucial for:

• correct operation of the ABS system during emergency braking,
• stable performance of auxiliary systems (e.g., traction control),
• maintaining proper communication between the wheel and the vehicle's electronics.

Front axle fitment – left and right side

The sensor has been designed for installation on the front axle, with the possibility of use on either the left or right side. This solution facilitates part selection during service – one type of sensor can handle both sides, provided it is compatible with the mounting system and electrical harness of the specific vehicle unit.

Placement on the vehicle includes:

• the front suspension zone,
• the area near the wheel hub,
• integration with the factory ABS electrical harness.

Benefits of using an original Mercedes sensor

Choosing an original ABS speed sensor for a Mercedes allows you to maintain consistency in electrical and mechanical parameters with the vehicle's factory configuration. Thanks to this:

• the ABS controller receives a signal with the correct characteristics,
• the risk of system memory errors (ABS/ESP warning light) is reduced,
• compatibility with other braking system components is maintained.

The product comes from the used original components segment, which for many premium car users represents a reasonable compromise between cost and quality. In practice, this allows for restoring the correct operation of the ABS system without the need to resort to cheaper replacements with uncertain parameters.

Professional selection by part numbers and compatibility

Selecting an ABS sensor for a specific Mercedes unit should be based on the OEM part number and interchangeable numbers, as well as vehicle data (model, year, version). This minimizes the risk of mismatching connectors, cable lengths, or the mounting method in the steering knuckle.

If you want to deepen your knowledge about the conscious choice of used modules and sensors, how to verify compatibility, and selection by part numbers, you will find practical tips in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Used ABS sensor in premium cars – trend and practice

In the premium vehicle segment, such as Mercedes, used original parts are increasingly being used as an alternative to new parts. This also applies to ABS speed sensors, where factory parameters and compatibility with vehicle electronics are key. A properly selected component allows you to maintain full functionality of the braking system within a rational service budget.

You can find more about current trends related to used parts for premium brands, including Mercedes, in our market analysis: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026.

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 sensors, signal cables, or components cooperating with the traction control system, check the available parts in the Mercedes ABS speed sensor category.