Mercedes W164 X164 W221 SRS Airbag Impact Crash Sensor A0038202926

Mercedes W164 X164 W221 SRS Impact Sensor is an original passive safety system component designed to work with the SRS airbag system in select Mercedes models. Precisely selected operating parameters and factory signal characteristics ensure the sensor provides stable airbag system response in the event of a collision. This is a solution for users who want to maintain consistency with the factory configuration of their car's safety electronics.

Specifications and technical data

• SKU: A0038202926
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0038202926
• Substitutable numbers: A0038202926, A 003 820 29 26, KZ
• Category: Other Starters, Alternators, ECUs & Wiring

Purpose and Function in the SRS System

The SRS Impact Sensor in Mercedes W164, X164, and W221 models is responsible for detecting overloads during a collision and transmitting a signal to the airbag control unit. A properly functioning sensor is crucial for:

• correct recognition of the direction and intensity of impact,
• proper activation of airbags and seatbelt pretensioners,
• maintaining compliance with factory safety algorithms.

By preserving the original operating characteristics, the sensor works with the vehicle's existing installation without the need for wiring harness or control unit software modifications.

Compatibility with Mercedes Vehicles

The presented SRS Impact Sensor has been designed for Mercedes W164, X164, and W221 platforms, where the safety system is based on a dedicated electronic architecture. Using a component from the same product line allows for:

• maintaining communication consistency on the vehicle's bus,
• preserving factory airbag deployment parameters,
• minimizing the risk of errors in the SRS control unit's memory.

The product belongs to the Other category, meaning it is a specialized component that complements the safety system, rather than a standard consumable part.

Product Characteristics and Condition

The sensor comes from the Mercedes brand offering and is a pre-owned part. As a used component, it offers a cost-effective solution for vehicles where restoring full SRS system functionality while maintaining original specifications is a priority. This type of component is particularly useful in situations such as:

• post-accident repairs, when replacing a damaged sensor is necessary,
• diagnosing airbag system errors related to incorrect signal readings,
• comprehensive rebuilding of the safety system after airbag deployment.

Using an original sensor from the same product family helps to reduce the risk of incompatibility that can occur when using aftermarket replacements with different electrical characteristics.

Benefits of Using an Original SRS Sensor

Choosing the Mercedes W164 X164 W221 SRS Impact Sensor is a solution for users and workshops that prioritize compliance with factory safety standards. Key benefits include:

• maintaining the original operating logic of the airbag system,
• easy integration with the vehicle's existing electrical system,
• reducing the risk of SRS errors appearing after installation.

This makes the sensor a suitable choice for both professional post-accident repairs and precise diagnostics of safety system faults.

Related Products and Technical Knowledge

If you are looking for other components in the Other category dedicated to this brand, check out our offer at Other Mercedes, where you will find a wide selection of components that complement electronic and mechanical systems. For a comparison of solutions used in sports versions of other manufacturers, it is worth reading the analysis of construction and equipment in RS models in the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which shows how premium manufacturers design powertrains, braking, and suspension systems in high-performance cars.