Airbag control unit with part number 65 67 9 296 494

What is the Airbag Control Unit 65 67 9 296 494?

The airbag control unit with part number 65 67 9 296 494 is a central control module of Bosch’s Modular Restraint System (MRS), specifically used in the BMW 3 Series F35. It processes signals from crash sensors and is responsible for the precise deployment of airbags and seatbelt pretensioners.

As the brain of the vehicle’s passive safety system, this control unit continuously monitors all connected components of the restraint system. These include front, side, and head airbags, seatbelt pretensioners, seat occupancy detection, and various acceleration sensors.

In the event of a collision, the control unit analyzes incoming sensor data within milliseconds to assess the severity of the impact. Based on this analysis, it determines which restraint systems need to be activated to provide optimal protection for occupants.

What Defects Occur in 65 67 9 296 494?

The most common causes of failure for control unit 65 67 9 296 494 are stored crash data following an accident that prevents reactivation, as well as internal electronic faults. These include power supply issues, defective SMD components, or complete communication failure.

A primary reason for repair is the storage of crash data. After a collision—even if no airbags deployed—the control unit internally locks itself to prevent reuse. This lock can only be reset by professional intervention.

Additionally, hardware defects may occur on the circuit board. Internal error codes indicating problems with the power supply or general control unit malfunctions are often due to damaged traces, corroded contacts, or failed electronic components.

Another serious defect is total communication failure. In such cases, no diagnostic tool can access the control unit, making in-vehicle fault analysis impossible and pointing to a deep-seated internal hardware issue.

How Do You Recognize a Fault in Control Unit 65 67 9 296 494?

A fault in the airbag control unit 65 67 9 296 494 typically manifests as a permanently illuminated airbag warning light on the instrument cluster. Additional signs include specific error messages on the display or a workshop’s inability to communicate with the control unit via the OBD2 interface.

The most obvious symptom is the persistently lit airbag warning light. It does not turn off after starting the engine, indicating a critical fault stored in the system that compromises the functionality of the restraint system.

In many cases, communication between a diagnostic tool and the airbag control unit becomes impossible. The control unit fails to respond to queries, preventing the fault memory from being read out.

Before attributing the issue to the control unit, the vehicle’s electrical environment must be checked. Problems with the power supply (terminal 15/30), ground connections, or the CAN bus can produce similar symptoms and should be ruled out prior to removing the unit.

In Which Vehicles Is Control Unit 65 67 9 296 494 Installed?

The Bosch/BMW MRS airbag control unit with part number 65 67 9 296 494 is manufacturer-specifically installed in BMW models. Its primary application is in the BMW 3 Series of the F35 generation, produced during a specific manufacturing period.

At Airbag24, professional repair services for part number 65 67 9 296 494 are offered for the following vehicle model:

BMW 3 Series F35 (2012–2019)

How Does Repair Proceed at Airbag24?

After submitting the removed control unit to Airbag24, a comprehensive technical analysis is performed. Repairs include professionally erasing crash data and restoring electronics in case of hardware defects. Each unit undergoes a final functional test and is returned with a 12-month warranty.

The process begins with a thorough initial diagnosis. Technicians conduct a visual inspection and read the internal fault memory to identify the exact cause of the malfunction and prepare a detailed test report.

Depending on the findings, necessary repair steps are initiated. Stored crash data is securely erased from the control unit’s EEPROM using specialized programming tools. For hardware defects, faulty components such as SMD parts are replaced, and damaged traces are repaired.

Upon completion of the restoration, a comprehensive final inspection verifies the proper functioning of all system components. It is recommended to perform a final system diagnosis after reinstalling the unit in the vehicle to ensure seamless communication among all airbag system components.

What shipping options are available at Airbag24?

For repairs at Airbag24, you can either send your control unit yourself or arrange a convenient UPS pickup. Returns are free via UPS Standard. Faster express options and cash-on-delivery are also available. Personal collection is possible as well.

For the outbound shipment, you have two choices: you can ship the package to us yourself or use the paid UPS pickup service, which will collect the package from a location of your choice.

The return shipment of your repaired control unit is free for you as a UPS Standard delivery.

If you prefer faster delivery or other payment methods, we additionally offer the following paid options: UPS Express shipping, UPS Standard shipping with cash-on-delivery, and UPS Express shipping with cash-on-delivery.

Alternatively, after completing the repair, you can also pick up your device in person at our premises.