Radar Sensor Mercedes W204 C117 Rear Blind Spot Right left N/O/S A0009053303

Radar Sensor Mercedes W204 C117 Rear Blind Spot Right left is a precision component from the Electronic control modules and controllers group, responsible for monitoring the area invisible in the side mirrors. This advanced sensor, mounted in the rear of the vehicle on the right or left side, supports active safety systems, increasing the comfort and confidence of driving Mercedes vehicles.

Specifications and technical data

• SKU: A0009053303
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009053303
• Substitutable numbers: A0009053303, A 000 905 33 03
• Location on the vehicle: Rear, Right, Left
• Category: ECUs & Computer Modules

Application and function of the blind spot radar sensor

The blind spot radar sensor works with factory-installed driver assistance systems, analyzing the situation in adjacent traffic lanes in the rear zone of the vehicle. Its placement at the rear of the car, on both the right and left sides, allows for effective detection of vehicles located in the blind spot of the mirrors and transmits information to the visual or acoustic warning system.

This component is particularly important when changing lanes, overtaking, and in heavy city traffic, where fast and reliable detection of nearby vehicles significantly reduces the risk of side collisions. Thanks to its integration with Mercedes onboard electronics, the module operates continuously, maintenance-free, and consistently with other safety systems.

Construction, integration, and compatibility in Mercedes vehicles

As a component from the Electronic control modules and controllers group, the radar sensor is designed for close cooperation with the vehicle's communication bus. It is responsible for:

• continuous scanning of the space behind the vehicle in the designated zone on the right and left sides,
• processing the radar signal into data understandable for body control units,
• transmitting information to driver warning systems.

The original design intended for Mercedes W204 and C117 series models ensures proper fitment of mounts, wiring harnesses, and software. As a result, installation is carried out in an orderly manner, without the need for modifications to the installation or interference with the body structure.

Condition, verification, and benefits of choosing a used module

The offered sensor comes from the used electronic components segment, which allows for a significant reduction in repair costs compared to purchasing a new module, while maintaining the functionality required by safety systems. Before being put back on sale, such components are standardly verified for correct communication with the vehicle's installation and operational stability under typical operating conditions.

Choosing a proven, used blind spot radar sensor is a sensible solution when:

• repairing after a rear-end collision,
• the module is damaged due to external interference or corrosion of the mounts,
• diagnosing blind spot monitoring system errors that require the replacement of a specific sensor.

Thanks to the preservation of the original Mercedes electronic architecture, the module can be correctly adapted in the vehicle after performing appropriate service procedures (e.g., coding or calibration, depending on the requirements of the given model).

Professional installation and safety system optimization

Due to the nature of the radar sensor's operation and its impact on driver assistance systems, installation in a specialized service center equipped with appropriate diagnostic facilities is recommended. Proper seating in the rear part of the body on the right or left side and maintaining the correct operating angle are crucial for the reliability of readings and the stability of the system's operation.

After installation, it is worth performing a full diagnostic of the electronic systems to confirm correct communication of the module with other controllers and the absence of active errors in the system memory. A blind spot monitoring system prepared in this way restores the comfort of using the vehicle and increases the level of safety during daily operation.

Expanding knowledge and selecting Mercedes electronics

If you are planning a comprehensive repair or upgrade of the safety and comfort zone in your Mercedes and need other elements from the same group, such as comfort modules, engine controllers, or additional parking assist sensors, check the available parts in the Mercedes electronic control modules and controllers category.

To better understand when choosing a used electronic module is cost-effective and how to consciously approach the purchase of such components, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?