Mercedes W213 C238 ABS Speed Sensor Front Axle Left Right N/O/S A2139052104

Mercedes W213 C238 ABS Speed Sensor Front Left Right is a precise safety system component responsible for accurately reading the rotational speed of the front axle wheels. A properly selected ABS sensor ensures stable operation of the anti-lock braking system, supports traction control, and improves the predictability of the vehicle's behavior during braking. This solution is designed for users expecting seamless integration of electronics with the braking system in their Mercedes E-Class and related models.

Specifications and technical data

• SKU: A2139052104
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139052104
• Substitutable numbers: A2139052104, A 213 905 21 04
• Location on the vehicle: Front, Left, Right
• Category: ABS Speed Sensors

Function and Role of the ABS Speed Sensor

The front axle ABS speed sensor generates a signal about the wheel's rotational speed, which is then analyzed by the braking system controller. Based on this data, the ABS system regulates brake circuit pressure, reducing the risk of wheel lock-up and loss of traction.

In practice, a functional sensor:

• stabilizes ABS system operation during sudden braking,
• supports the operation of assistance systems such as traction control and stability control,
• reduces braking distance in critical situations,
• minimizes the occurrence of errors and warning messages on the instrument cluster.

Intended Use and Vehicle Placement

The presented component belongs to the ABS Speed Sensor category and is designed for installation on the front axle, on the left or right side. This placement allows for symmetrical data collection from both front wheels, which is crucial for the correct operation of the braking system in modern Mercedes designs.

Vehicle placement includes:

• front axle area – cooperation with the hub and pulse ring,
• left side – typical integration with the driver's side electrical system,
• right side – analogous configuration on the passenger side.

This configuration facilitates servicing and diagnostics, as it allows for the replacement of a single sensor in a specific corner of the vehicle without interfering with other system components.

Product Characteristics and Application Benefits

The offered ABS speed sensor is a dedicated component for Mercedes vehicles, ensuring correct geometric fit and electrical compatibility with the factory installation. This allows for a straightforward installation without the need for wiring modifications or adapters.

Key benefits of using this solution:

• Precise Rotational Speed Reading – improves ABS system performance in typical and emergency driving conditions.
• Compatibility with the factory braking system architecture – the sensor works with original system components.
• Can be used on the left or right front side – increases service flexibility.
• Solution compliant with the design specifications of Mercedes W213 / C238 models – maintains factory safety system operating parameters.

Item Condition and Usage Aspects

The product is offered in used condition, allowing for economical ABS system repair while maintaining proper functionality. This type of component is particularly attractive when cost reduction is a priority while ensuring the correct operation of safety systems.

Choosing a used ABS speed sensor can be beneficial in cases such as:

• repair after mechanical damage to the sensor cable or housing,
• eliminating ABS system errors caused by an incorrect signal from one wheel,
• restoring full system functionality after suspension or brake work.

Comprehensive Approach to the ABS System in Mercedes

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and require other components from the same group, such as additional sensors, signal cables, or mounting elements, check the available parts in the Mercedes ABS Speed Sensor category.

When working with safety and drivetrain systems, it is also worth considering the condition of other components, such as the differential or other sensors interacting with the vehicle's electronics. Practical tips on selecting and evaluating used components can be found in the article: Used Differentials – What You Should Know About Used Differentials, Sensors, and Drivetrain Systems.

Summary

The Mercedes W213 C238 ABS Speed Sensor Front Left Right is a functional solution for users looking to restore the proper operation of the ABS system and related assistance systems in their vehicle. Its dedicated design for the front axle and applicability on both sides make it a practical choice for servicing the braking system in modern Mercedes models.