Airbag control unit with part number 9640341180

What is the function of the airbag control unit 9640341180?

The airbag control unit with part number 9640341180 is the central control unit of the occupant protection system in the Peugeot 607. It analyzes data from the acceleration sensors and, within milliseconds, decides whether to deploy airbags and tighten seatbelts, thereby providing optimal protection for vehicle occupants in the event of a crash.

This unit is specifically designed for the first-generation Peugeot 607 (2000–2004) as well as its subsequent facelift model (2004–2010). As the “brain” of the passive safety system, it continuously communicates with all relevant sensors and actuators in the vehicle to ensure flawless operation.

Technically, this control unit is also known under alternative OEM part numbers 6556YV, 6545JK, and 9659531880. Precise identification is crucial for diagnosis and repair to restore full functionality of the safety system.

Why does the control unit 9640341180 fail?

The most common causes of failure for the control unit 9640341180 are internal electronic malfunctions and permanently stored crash data following a collision. External factors such as moisture, pre-existing damage from improper repair attempts, or age-related wear of components often lead to complete failure as well.

A key reason for repair is the storage of crash data. After an accident, the control unit locks itself internally to prevent reuse. This lock is permanent and can only be reset through specialized hardware-level intervention.

Internal errors in the fault memory also frequently occur, indicating defective components on the circuit board. These may include error codes such as “internal error,” “side airbag no connection,” or “crash sensor/seat airbag defective.” Such faults are typically due to hardware defects rather than software issues.

How do you recognize a defect in the 9640341180?

A defect in the control unit 9640341180 primarily manifests as the airbag warning light remaining constantly illuminated or glowing in the instrument cluster. Another clear indication is the lack of communication with the control unit when a workshop attempts to read the fault memory using a diagnostic tool (OBD2).

The most obvious symptom is the persistently lit airbag warning light. It does not turn off after starting the engine, signaling a serious, safety-critical system error.

In the workshop, the defect often becomes apparent when the diagnostic tool cannot access the airbag control unit. The unit fails to respond to requests, preventing accurate fault analysis and directly pointing to a failure of the control unit itself.

In addition, specific error codes may be stored in the memory, directly indicating an internal malfunction of the device. In rarer cases, unusual symptoms may appear, such as a lingering glow from the speedometer illumination when locking the vehicle or issues with the passenger-side airbag after deployment.

In which models is the 9640341180 installed?

The airbag control unit with part number 9640341180 was developed specifically for the Peugeot 607. It is found in both first-generation vehicles and the revised facelift models. At Airbag24, we professionally refurbish this control unit for the entire model range.

At Airbag24, we repair the control unit 9640341180 for the following vehicle models:

Peugeot 607 I (model series 9D, 9U) from 2000 to 2004

Peugeot 607 I Facelift (model series 9D, 9U) from 2004 to 2010

How does the repair process work at Airbag24?

The repair process at Airbag24 is designed for maximum efficiency and safety. Upon receiving your control unit 9640341180, our technicians perform a detailed analysis, fix the defect at the component level, and erase any existing crash data. A final functional test ensures flawless operation.

It is recommended that, before removing the control unit, you have the fault memory read out at a specialized workshop and obtain a printed copy of the diagnostic report. This helps narrow down the problem and speeds up diagnosis.

After arrival at Airbag24, the unit undergoes a thorough inspection. Our technicians precisely identify the root cause of the issue—whether it’s a hardware defect or a lock caused by crash data—and then proceed with professional restoration, replacing faulty components and resetting the device’s software to factory settings.

Following successful repair, the control unit undergoes a comprehensive final test on specialized test benches. Only once all functions have been fully restored is the unit cleared for return shipment. We provide 2 years' statutory liability for defects on every repair.