Speed Sensor Mercedes ML W164 W205 Rear Axle Left N/S ABS Sensor A1645400717

Speed Sensor Mercedes ML W164 W205 Rear Axle Left N/S ABS Sensor is a precision safety system component responsible for accurately reading the rotational speed of the rear left wheel. A properly functioning ABS sensor supports the stable operation of the braking system, traction control, and other electronic driving assistance systems. This Mercedes brand component is designed for demanding users who expect reliable ABS performance and consistency with the vehicle's factory electronics.

Specifications and technical data

• SKU: A1645400717
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645400717
• Substitutable numbers: A1645400717, A 164 540 07 17
• Location on the vehicle: Rear, Left
• Category: Other Brake Parts

Function and role of the ABS sensor in the Mercedes ML

The rotational speed sensor on the rear left axle is responsible for generating a signal that the ABS controller uses to analyze wheel speed. Based on this, the system can:

• limit wheel lock-up during braking,
• support the operation of traction control and electronic stability control,
• ensure even distribution of braking force between the wheels.

Thanks to accurate rotational speed readings, the ABS system reacts predictably and helps maintain control of the vehicle in emergency situations. A functional sensor on the rear left side is particularly important when braking on slippery surfaces and during dynamic driving.

Compatibility and fitment to the vehicle system

The offered sensor has been designed to work with the factory electronic system of Mercedes ML models from the W164 and W205 series. This ensures the correct signal parameters, the appropriate electrical connector, and mounting geometry matched to the hub and rear axle steering knuckle.

The component is intended for installation on the rear left axle, which eliminates the risk of error when selecting the vehicle side. Proper placement on the vehicle is crucial for the correct interpretation of signals by the ABS controller and for avoiding errors in the fault memory.

Product characteristics and condition

The presented ABS sensor is an original Mercedes brand component sourced from the secondary market. A used part allows for an economical repair of the braking system while maintaining compliance with the vehicle's factory specifications. This type of part is a good choice when the existing sensor is generating errors, causing ABS/ESP warning lights to illuminate, or interfering with the operation of assistance systems.

Choosing a used OEM sensor is a solution that often provides a better fit than aftermarket replacements of unknown origin. Original geometry and signal type promote seamless cooperation with the existing wiring harness and controller.

Benefits of replacing the ABS sensor on the rear axle

Replacing a faulty ABS sensor with a functional unit dedicated to the rear left side can bring a number of practical benefits:

• reduction of ABS and ESP system errors stored in the controller,
• more stable braking system operation in emergency situations,
• better cooperation with traction control systems,
• reduction of unwanted warning messages on the dashboard.

For users who are upgrading or servicing the braking system, selecting the correct rotational speed sensor is one of the key stages in restoring full system functionality. A correctly selected rear-left component helps avoid repeated disassembly and additional diagnostic costs.

Professional approach to parts selection

When choosing an ABS sensor, it is worth paying attention to compliance with the manufacturer's markings and the placement on the vehicle. In our offer, you will also find other braking and drivetrain components that can be selected for a specific model and engine version. If you are interested in a broader context of the differences between sports versions and standard ones, including the impact of the braking system and chassis on handling, check out the article Audi RS vs other models – what is hidden under the hood and chassis?, which covers issues related to the selection of parts in high-performance cars.