Airbag control unit with part number 9677910680

What is the function of the airbag control unit 9677910680?

The airbag control unit with part number 9677910680 is a central control module for the passive safety system in the Peugeot 508 SW I. It is responsible for processing sensor data and precisely activating the airbags and seatbelt pretensioners in the event of a crash, thereby protecting the occupants.

As the electronic “brain” of the restraint system, this component continuously monitors signals from the crash sensors distributed throughout the vehicle. In the event of a collision, the control unit determines within milliseconds which safety devices—such as front or side airbags—need to be deployed to provide maximum protection.

Why does the control unit 9677910680 fail?

Defects in the control unit 9677910680 are primarily electronic in nature. The most common causes include communication failures, component failure due to overheating or moisture, and internal malfunctions following an accident. These hardware defects prevent the device from performing its functions reliably, resulting in a complete failure of the safety system.

Electronic failures often manifest as communication issues, where the control unit becomes inaccessible to diagnostic tools, or as warning light errors that trigger persistent alerts. Causes such as thermal stress (overheating), moisture ingress, or the physical consequences of a crash can damage the sensitive components on the circuit board.

This control unit is also known under the alternative part numbers 9678656380, A2C53323336, 6546CN, and 9675127080. A defect in any of these numbers presents the same fault symptoms, as they share identical technical specifications.

How do you recognize a defect in the 9677910680?

A typical symptom of a defect in the control unit 9677910680 is a permanently illuminated airbag warning light on the instrument panel. Often, communication with diagnostic equipment is also lost. Additional signs may include a malfunctioning clock or a complete system failure when exposed to heat, indicating a serious internal issue.

The most common and unmistakable sign is the persistently lit airbag warning light, which either illuminates immediately upon ignition or while the engine is running and never goes out.

In the workshop, the defect often shows up as a complete loss of communication. The control unit becomes unresponsive to standard diagnostic tools, complicating troubleshooting and pointing directly to an internal malfunction.

Unusual accompanying symptoms may also occur. Customers report a non-functioning clock or total failure of the unit at high interior temperatures. Another specific symptom is that only the airbag light illuminates when the ignition is turned on, while the engine check light flashes.

In which models is the 9677910680 installed?

The airbag control unit with part number 9677910680 is specifically designed for Peugeot vehicles. It is exclusively used in the Peugeot 508 SW I, both in its first generation (2010–2014) and in the facelifted model (2014–2018). Other models or brands are not compatible.

At Airbag24, we repair part number 9677910680 and equivalent variants for the following vehicle:

Peugeot: 508 SW I (station wagon, type 8E_) manufactured between 2010 and 2018, including the facelifted version from 2014 onward.

How does the repair process work at Airbag24?

Professional repair of the control unit 9677910680 at Airbag24 restores full functionality. After removal and shipment, the unit undergoes a detailed electronic analysis. Faulty components are replaced, solder joints are inspected, and the device is then tested on a dedicated test bench.

Upon arrival of the defective control unit at our workshop, our technicians perform a comprehensive initial inspection to verify reported faults. Repairs are carried out at the component level, meaning that specific faulty parts—such as processors, memory modules, or other electronic elements—are replaced.

Subsequently, the repaired control unit undergoes an end-of-line test on a specialized test bench that simulates real-world vehicle conditions. This ensures that all functions, particularly communication and deployment circuits, operate flawlessly once again. We offer 2 years' statutory liability for defects on every repair.