Airbag control unit with part number 15249432

What is the function of Airbag Control Unit 15249432?

The airbag control unit with part number 15249432 is the central control module for the occupant safety system (SRS/SDM) in the first-generation Chevrolet Cobalt (2004–2010). It processes data from crash sensors and determines whether and which airbags or seatbelt pretensioners should deploy during a collision. Additionally, it stores crash data, which can lead to a lockout.

This component, also known as the Airbag Control Module (ACM), plays a critical role in ensuring passenger safety. After deployment, the unit permanently saves so‑called crash data in its internal memory. This storage serves as a safety measure to prevent reuse without professional inspection and repair.

The control unit is uniquely identified by the Vehicle Identification Number (VIN), model year, and part number. For part number 15249432, technically identical and interchangeable alternative numbers such as 22729009 and 22729011 exist, which were also used in the Chevrolet Cobalt.

Why does control unit 15249432 fail? Common defects

The most frequent cause of failure for control unit 15249432 is stored crash data following an accident, which locks the system. Another typical issue is internal electronic faults on the circuit board, triggering error code B1000 (control unit defective) and illuminating the airbag warning light.

Stored crash data is the primary reason for malfunctions. Even after repairing visible accident damage, the control unit remains internally locked until this data is professionally erased. The system cannot be restarted, and passenger safety is no longer guaranteed.

Independent of accidents, hardware defects may also occur. Faulty electronic components—such as capacitors, resistors, or processor errors on the circuit board—can result in an internal system fault. This is typically logged in the fault memory as error code B1000, making electronic repair unavoidable.

How do you recognize a defect in the airbag control unit?

The clearest symptom of a defect in control unit 15249432 is the continuously illuminated airbag warning light on the instrument cluster. Often, the fault memory cannot be cleared, and diagnostics reveal error code B1000, directly indicating an internal malfunction of the control unit.

The airbag warning light that fails to extinguish after starting the engine is a clear warning sign. It indicates that the entire restraint system is disabled. In the event of another collision, airbags and seatbelt pretensioners would not deploy.

Diagnostics performed at a specialized workshop confirm the suspicion. A professional diagnostic tool reads the system to identify exact error codes. An unerasable B1000 error code or the inability to communicate with the control unit at all are typical signs of a defect requiring repair.

In which vehicles is control unit 15249432 installed?

The airbag control unit with part number 15249432, along with compatible numbers 22729009 and 22729011, was specifically developed for the first-generation Chevrolet Cobalt. It is found in models produced between 2004 and 2010.

At Airbag24, we repair these control unit variants for the following specific vehicle model:

Chevrolet Cobalt (1st generation, model years 2004–2010)

How is control unit 15249432 professionally repaired?

Professional repair at Airbag24 restores full functionality to the control unit. First, stored crash data is securely and completely erased. Then, the circuit board undergoes a detailed inspection for additional electronic defects, which are fixed to ensure long-term reliability.

After submission to Airbag24, the control unit follows a standardized process. Technicians begin by reading the internal memory to remove crash data, returning the device to its pre‑accident state without altering the vehicle‑specific configuration.

In the second step, a comprehensive hardware analysis is conducted, examining all relevant electronic components on the circuit board. Defective parts—such as those causing error code B1000—are replaced with new, high‑quality components.

Finally, a functional test ensures that the control unit communicates flawlessly again and correctly processes all system parameters. We provide 2 years' statutory liability for defects on every repair.