Mercedes ML W166 Wheel Speed Sensor Front Left Right N/O/S ABS Cable A1669052601

Mercedes ML W166 Wheel Speed Sensor Front Left Right N/O/S ABS Cable is a precision safety system component responsible for the accurate reading of the front wheel rotational speed. A properly selected sensor ensures stable ABS system operation, improves traction control, and supports the performance of advanced driver assistance systems. This is a solution for users who expect consistent cooperation between electronics and the braking system as well as reliable performance in daily operation.

Specifications and technical data

• SKU: A1669052601
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1669052601
• Substitutable numbers: A1669052601, A 166 905 26 01
• Location on the vehicle: Front, Left, Right
• Category: ABS Speed Sensors

Purpose and vehicle placement

The presented item from the ABS Speed Sensor category has been designed for use on the front axle, with the possibility of installation on both the left and right sides. Such a solution facilitates selection and service while maintaining consistent measurement parameters on both front wheels. A correctly installed sensor transmits a signal to the controller, which then regulates the pressure in the braking system, reducing slippage and improving vehicle stability.

Function in the ABS system and vehicle electronics

The wheel speed sensor in Mercedes models is responsible for generating a pulse signal proportional to the wheel's rotational speed. Based on this, the ABS system:

• monitors the rotational speed of the front wheels in real-time,
• detects the tendency for wheel lock-up during braking,
• adjusts braking force to maintain the best possible grip,
• supports the operation of electronic stability control and traction control systems.

Thanks to this, even in difficult road conditions, the driver maintains better vehicle control, and the braking system operates in a more predictable manner. A functional ABS speed sensor is crucial for the proper operation of all electronics responsible for driving safety.

Characteristics and advantages of use

The offered sensor is a component designed for a specific vehicle platform, which translates into proper geometric fit and electrical compatibility with the factory installation. The main advantages of using this solution in a Mercedes ML W166 include:

• maintaining the factory logic of the ABS system and related systems,
• stable front wheel speed reading across the full range of driving speeds,
• reducing the risk of controller errors resulting from an incorrect signal,
• possibility of installation on the left or right side of the vehicle front, which simplifies service maintenance.

A properly selected and installed component allows for restoring the correct operation of the ABS system after a failure or replacement of other braking system components. This is particularly important in vehicles equipped with extensive electronics, where signal consistency from sensors has a direct impact on driving comfort and safety.

Condition and installation aspects

The product is offered as a used part, which allows for economical repair while maintaining appropriate performance parameters. Before installation, a standard service procedure is recommended, including checking the wiring harness, the socket, and cleaning the mounting seat in the steering knuckle or hubs to ensure proper seating and signal reading. Correctly performed installation minimizes the risk of recurring ABS system errors and limits the need for additional interference with the electrical installation.

Selection by OEM number and technical support

To ensure full compatibility with a specific equipment version, it is worth verifying the sensor's compatibility with the vehicle based on the OEM number or catalog data. In case of doubts regarding selection, installation, or interpretation of markings, a guide describing practical rules for working with used electronics and sensors in Mercedes cars will be helpful. Detailed information can be found in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Additional support in matching the component to a specific vehicle can be found in a guide dedicated to identifying parts by OEM number and vehicle data. Practical step-by-step tips can be found in the material Guide: how to choose the right car part by VIN and OEM number.

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 sensors for the remaining wheels, signal cables, or mounting elements, check the available parts in the Mercedes ABS Speed Sensor category.