Mercedes W221 Blind Spot Radar Distance Sensor Rear Left Right N/O/S A0025409117

Mercedes W221 Parking Distance Sensor Radar Left Right Rear is a component from the Electronic Control Units and Controllers category, responsible for precise distance measurement behind the vehicle. It enables efficient operation of driver assistance systems, increasing maneuvering safety and comfort during daily use. This solution is designed for users who expect stable operation of electronic systems in their Mercedes.

Specifications and technical data

• SKU: A0025409117
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0025409117
• Substitutable numbers: A0025409117, A 002 540 91 17
• Location on the vehicle: Rear, Right, Left
• Category: ECUs & Computer Modules

Sensor Purpose and Placement

The radar distance sensor is designed for installation at the rear of the vehicle, with the possibility of installation on both the left and right sides. This placement allows for effective monitoring of the space behind the car when reversing, parking, and maneuvering in confined areas. The component works with the factory electronic systems of Mercedes, maintaining consistency with the original vehicle architecture.

Technical and Functional Characteristics

As a component from the Electronic Control Units and Controllers group, the sensor is responsible for processing radar signals into data used by driver assistance systems. A properly functioning module:

• ensures stable reading of the distance to obstacles behind the vehicle,
• supports the operation of warning systems and parking assistants,
• maintains communication consistency with other controllers in the vehicle network.

By maintaining the original operating logic, the sensor integrates with the existing installation without the need for wiring modifications or additional adapters, provided it is selected according to the service documentation.

Benefits of Using an Original Mercedes Module

Using a sensor dedicated to the Mercedes W221 allows for maintaining the factory performance parameters of safety systems. Key benefits include:

• Compatibility with vehicle electronics – the module works with original controllers without software conflicts.
• Stable operation of assistance systems – accurate distance readings translate into predictable driver alerts.
• Reduced risk of CAN network errors – proper component selection minimizes the likelihood of errors appearing in the controller memory.

For users who value maintaining the characteristic operating culture of Mercedes electronic systems, choosing such a module is a technically justified solution.

Component Condition and Installation Aspects

The sensor is offered as a used part, allowing for economical restoration of system functionality without the need to invest in a new component. Before installation, it is recommended to:

• verify compatibility with part numbers in the service documentation,
• inspect the wiring harness and connectors for mechanical damage and corrosion,
• perform adaptation or calibration in the controller, if required by the manufacturer's procedure.

A properly installed sensor restores the functionality of assistance systems, which directly impacts the comfort and safety of using the vehicle.

Mercedes Electronic Control Units and Controllers – Selection and Knowledge Development

If you are looking for other Mercedes Electronic Control Units and Controllers, use the dedicated category: Mercedes Electronic Control Units and Controllers. There you will find a wide selection of components tailored to various models of this brand, which will facilitate comprehensive servicing of electronic systems in your car.

To deepen your knowledge about the importance of original electronic components in modern premium cars, we recommend reading the article on our blog: Audi and Pure Emotion – How Used Parts Help Maintain the Brand's DNA. The text shows how properly selected modules and controllers influence the preservation of the vehicle's factory character, which is equally important for Mercedes models.