Mercedes W166 Rear Axle ABS Control Sensor Left Right N/O/S A1669054102

Mercedes W166 Rear Axle ABS Control Sensor Left Right is an original traction control system component designed for installation on the vehicle's rear axle. The sensor is responsible for the precise reading of wheel rotational speed, which is crucial for the proper operation of the ABS system and driving stability. Thanks to its factory origin and perfect fit for the W166 platform, it represents a consistent service solution for demanding users.

Specifications and technical data

• SKU: A1669054102
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1669054102
• Substitutable numbers: A1669054102, A 166 905 41 02
• Location on the vehicle: Rear, Right, Left
• Category: Other Brake Parts

Purpose and vehicle placement

The presented ABS sensor has been designed for operation on the rear axle, with the possibility of installation on both the left and right sides. This solution simplifies part selection and allows for flexible use of the component depending on service needs. Its placement in the rear suspension zone ensures the component works directly with the braking system and vehicle safety systems.

Thanks to its dedicated fit for the W166 design, the sensor maintains the correct mounting geometry, which translates into a stable measurement signal and proper cooperation with the vehicle's electronics.

Function in the ABS and safety systems

The rear axle ABS sensor is responsible for generating a wheel speed signal, which is then analyzed by the brake system controller. Based on this data, the ABS system can:

• limit wheel lock-up during braking,
• support the operation of electronic stability control systems,
• influence the performance of traction control systems.

A functional sensor is therefore essential for maintaining predictable vehicle behavior during braking and traction on various surfaces. Replacing a worn-out part with an original component dedicated to the W166 allows for restoring proper communication with the ABS module and reducing the risk of error messages on the dashboard.

Product characteristics and advantages

The offered ABS sensor comes from the Mercedes parts group, which ensures factory manufacturing standards and compatibility with the vehicle's electrical installation. The design, intended for operation in chassis conditions, provides resistance to typical operational loads, such as temperature changes or contact with moisture and road debris.

Key benefits of using this component in a Mercedes W166 include:

• dedicated fit for the vehicle's rear axle,
• possibility of installation on the left or right side,
• maintenance of operating parameters in accordance with the manufacturer's specifications,
• consistency with the factory ABS system and driver assistance systems.

Condition and service application

The product is offered as a used component, which allows for an economical repair of the ABS system while maintaining the original specification. This type of solution is particularly beneficial for servicing vehicles used intensively, where both technical compliance and rational maintenance costs are important. The sensor will work well as a replacement in case of ABS system errors related to wheel speed readings on the rear axle.

System expansion and related components

If you are planning a comprehensive repair or upgrade of the chassis zone in your Mercedes and need other elements from the same group, such as additional sensors, wiring harnesses, or mounts, check out the available parts in the Other Mercedes category.

For a comparison of solutions used in sports constructions of other brands and a better understanding of the role of braking and chassis systems in car performance, it is worth reading the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses the differences in engine, brake, and suspension design.