Mercedes W204 Air Module Rear Right O/S Door SRS Control Unit A2048600405

The Mercedes W204 Rear Right Door Airbag Module is a specialized component from the Electronic Control Modules and Controllers group, responsible for precise control of the SRS system in the vehicle's rear right door. This solution is designed for users who expect to maintain factory safety parameters and proper integration with the car's electronic system.

Specifications and technical data

• SKU: A2048600405
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2048600405
• Substitutable numbers: A2048600405, A 204 860 04 05
• Location on the vehicle: Rear, Right
• Category: ECUs & Computer Modules

Module Purpose and Function

The offered SRS module is dedicated for installation in the rear right body area, where it is responsible for managing the airbag system and crash sensors in the door. Its task is to quickly interpret signals from the vehicle's system and transmit appropriate commands to the actuators, which is crucial for maintaining the correct sequence of operation for the passive safety system.

Thanks to its construction compliant with factory Mercedes standards, the module maintains full integration with the vehicle's communication bus, enabling proper diagnostics, error clearing, and adaptation within the SRS system. This is particularly important for professional post-collision repairs or replacement of damaged airbag system components.

Benefits of Using an Original Module

Using an original module for the rear right side of the body allows for consistency in the safety system configuration with the rest of the car's electronics. In practice, this means:

• maintaining the factory operating logic of the SRS system in the rear right door,
• proper cooperation with sensors and the wiring harness in this part of the body,
• easier computer diagnostics at the service center,
• reduced risk of incompatibility with central controller software.

As a component from the Electronic Control Modules and Controllers category, the module has been designed for stable operation in demanding operating conditions typical for doors – with frequent changes in temperature, humidity, and vibrations.

Condition, Origin, and Service Application

The product is offered as a used part, allowing for economical repair of the SRS system while maintaining the original manufacturer's specifications. This solution is particularly beneficial for post-accident repairs where replacing the entire set of new controllers would be disproportionately expensive compared to the vehicle's value.

The module is suitable for both professional workshops specializing in the Mercedes brand and independent service centers that perform comprehensive body electronics repairs. Its placement on the rear right side of the vehicle facilitates unambiguous identification of the component during selection and installation.

Selection, Compatibility, and Technical Support

Due to the specificity of safety systems, when selecting an SRS module for the Mercedes W204, it is recommended to verify compatibility by OEM number and vehicle configuration. Proper selection based on body version and equipment minimizes the risk of communication errors with other controllers and facilitates post-installation adaptation.

For users who wish to deepen their knowledge on the safe use of used controllers and sensors in modern cars, a guide on selecting and installing onboard electronics will be useful: Used Car Electronics – Second-Hand Modules and Sensors in Service Practice.

Expanding Body Electronics Repairs for Mercedes

If you are planning a comprehensive repair or upgrade of the body electronics zone in your Mercedes and need other parts from the same group, such as comfort controllers, door modules, or lighting control units, check the available parts in the Mercedes Electronic Control Modules and Controllers category.

Choosing used electronic parts from dismantling can also be a conscious way to reduce service costs and waste. You can read more about the environmental and budget impact of such decisions in the article: Circular Economy in the Garage – Practical Benefits of Used Parts.