Mercedes W204 W207 A207 Airbag Air Bag Crash Sensor Module A1729056100

MERCEDES W204 W207 A207 Impact Sensor is an original part from the Other category, designed for use in Mercedes vehicles. It is a precise component of the passive safety system, responsible for rapid collision detection and signal transmission to the control modules for airbags and other protective systems, ensuring a higher level of protection for the driver and passengers.

Specifications and technical data

• SKU: A1729056100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1729056100
• Substitutable numbers: A1729056100, A 172 905 61 00, KZ
• Category: Other Interior Parts & Accessories

Purpose and Function of the Impact Sensor

The impact sensor in Mercedes W204 class and W207/A207 series models operates within the SRS system, monitoring body accelerations and overloads during a collision. Its task is to transmit a signal to the control unit, which, based on the collected data, decides on the activation of airbags and seatbelt pretensioners. A properly functioning sensor is crucial for maintaining the vehicle's factory safety parameters.

This component works with other safety system components, forming a cohesive system that reacts in fractions of a second. Replacing a damaged sensor with a functional OEM component allows for the restoration of correct communication within the installation and avoids SRS system errors displayed on the instrument cluster.

Benefits of Using an Original Mercedes Sensor

Using an original impact sensor in Mercedes W204, W207, and A207 ensures:

• Full compatibility with the electrical system – correct connectors, mounting geometry, and operating parameters matched to the factory system.
• Stable cooperation with the SRS control module, without the need for wiring modifications or mechanical adaptation.
• Maintenance of the safety system's activation thresholds as intended by the manufacturer.
• Reduced risk of airbag system errors appearing after installation.

Thanks to this, the MERCEDES W204 W207 A207 Impact Sensor is the preferred solution for professional post-accident repairs and for rectifying SRS system faults in vehicles of this brand.

Characteristics and Practical Application

The presented sensor belongs to the group of passive safety monitoring elements, therefore its selection should be based on compatibility with the specific vehicle platform. For the W204 and W207/A207 series, it is important to maintain the correct sensor type so that the control unit can correctly interpret signals from the body. Installation is carried out in the location designated by the manufacturer, which allows for the preservation of correct measurement characteristics.

The product comes from the Other segment, meaning it is a specialized element, not classified as typical wear parts. In practice, it is used for:

• post-accident repairs, when the existing sensor has been mechanically damaged,
• diagnosing SRS system faults, when tests indicate incorrect sensor operation,
• restoring the full functionality of the safety system after replacing other system components.

Condition, Verification, and Installation Aspects

The offered impact sensor is a used item, which in practice means it comes from a dismantled vehicle and has been verified for its suitability for further use. Such components are often chosen by workshops and users looking for a reasonable compromise between repair cost and maintaining the vehicle's original specifications.

Before installation, it is recommended to:

• check compatibility with the specific body version and year of the vehicle,
• inspect the electrical system and connectors for mechanical damage and corrosion,
• perform computer diagnostics after installation to clear any errors and confirm correct communication with the SRS module.

Other Elements and Technical Materials

If you are looking for other elements from the Other category dedicated to vehicles of this brand, check our offer for other parts and accessories in the Other category for Mercedes, where you will find a wide selection of OEM components for various models.

For those interested in comparing technical solutions used in premium sports car variants, we recommend an article describing the differences in engine, brake, and chassis construction – Audi RS vs. Other Models – What Lies Under the Hood and Chassis?. This is a good supplement to knowledge about advanced systems used in modern cars.