BMW 3 5 7 Z3 Series E36 E38 E39 E46 Side Crash Impact Sensor 6902054

BMW 3 5 7 Z3 Series E36 E38 E39 E46 Side Crash Impact Sensor is an original side impact sensor from the Airbag Parts category, designed for factory BMW safety systems. This component works with the airbag control module, ensuring precise detection of side collisions and proper SRS system response.

Specifications and technical data

• SKU: 6902054
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8381564
• Substitutable numbers: 65776902054, 6902054, 65778381564, 8381564, 65778369024, 8369024, 65778375643, 8375643, BG
• Category: Airbag Parts

Purpose and function of the side impact sensor

The presented side sensor is used in popular BMW 3, 5, 7, and Z3 series models of the E36, E38, E39, and E46 generations, where it is responsible for detecting deceleration during a side collision. Upon detecting the appropriate acceleration threshold, it sends a signal to the SRS controller, which determines the deployment of airbags and side curtains. This allows the safety system to operate in a controlled manner, consistent with the manufacturer's factory specifications.

Design and integration with the SRS system

The sensor is designed as an OEM BMW component, which means full compatibility with the factory electrical installation and body structure. The housing is adapted for mounting in the sill or pillar area, and the electrical connector works with the vehicle's original wiring harness. As a result, installation is straightforward, without the need for wiring modifications or the use of adapters.

The component has an assigned OEM part number and associated interchangeable numbers, which facilitates the selection of the correct variant for a specific vehicle configuration. In practice, this means the sensor can be precisely matched to a given model year, trim level, and body type within the mentioned BMW series.

Condition, verification, and service application

The offered sensor is in used condition, which, in the case of original BMW components, provides a favorable compromise between quality and repair costs. This type of component is particularly useful for:

• post-accident repairs in the side body area,
• clearing SRS system errors related to impact sensors,
• restoring full functionality to the factory airbag system.

Due to its importance for safety, it is recommended that installation be performed by an experienced service center, using appropriate diagnostic tools to clear errors and verify the system's correct operation after replacement.

Benefits of using an original BMW sensor

Using an original side sensor instead of a non-original or damaged component helps maintain the integrity of the entire SRS system. Key advantages include:

• Factory compatibility – perfect fit for specific BMW series without the risk of communication issues with the control module.
• Stable operating parameters – the sensor is designed based on the body characteristics and activation thresholds specified by the manufacturer.
• Hassle-free installation – original mounting points and electrical connectors compatible with the vehicle's wiring.

Expanding repairs within the BMW airbag system

If you are planning a comprehensive repair or upgrade of the passive safety zone in your BMW and need other components from the same group, such as crash sensors, SRS control modules, or airbag system wiring harnesses, check out the available parts in the BMW Airbag Parts category.

More about used parts in the automotive industry

When selecting used safety system components, it is worth knowing the general principles regarding quality, compatibility, and cost-effectiveness of such solutions. A broader context on using second-hand parts in German car brands can be found in the article: Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?, which discusses practical aspects of choosing and installing used components.