Airbag control unit with part number 6545GP

What is the function of the airbag control unit 6545GP?

The airbag control unit with part number 6545GP is the central control module for the occupant safety system (SRS) in the Peugeot 206 SW I and related models such as the Peugeot Partner II. As an original equipment (OE) component, it processes signals from crash sensors, deploys the airbags and seatbelt pretensioners in the event of a collision, and continuously monitors the functionality of the entire safety system.

The 6545GP control unit is the brain of the passive safety system. It continuously collects data from various acceleration and pressure sensors throughout the vehicle to accurately detect a crash situation and assess its severity.

Once predefined threshold values for a collision are exceeded, the unit’s electronics send ignition pulses to the corresponding airbag modules and seatbelt pretensioners within milliseconds. At the same time, it ensures that the SRS warning light on the instrument cluster illuminates in case of a system malfunction, alerting the driver.

Why does the 6545GP control unit fail?

The most common cause of failure for the 6545GP control unit is the storage of crash data after an accident, which permanently locks the device. Other defects are purely electronic in nature and include water damage, short circuits caused by jump-starts, corrosion at the connectors, or internal component failures. Communication issues via the CAN bus can also occur.

After an airbag deployment or seatbelt pretensioner activation, the control unit irrevocably writes crash data into its internal memory. This lockout is a manufacturer‑imposed safety feature designed to prevent the reuse of a potentially damaged unit. A professional repair addresses this issue by systematically erasing the stored crash data.

Electronic faults are also prevalent. Incorrect polarity during a jump-start can damage the sensitive electronics. Ingress of moisture leads to corrosion on the circuit board and connector pins, resulting in short circuits or broken traces.

In workshop diagnostics, it is crucial to determine whether the fault truly originates in the control unit itself or is caused by external components such as defective sensors, cable breaks, or problems with the seat occupancy sensor mat. The 6545GP control unit is technically related to part numbers 9650136780 and 9645341980, which may exhibit similar fault patterns.

How do you recognize a defect in the 6545GP?

A defect in the 6545GP airbag control unit almost always manifests as a constantly illuminated or flashing SRS warning light on the dashboard. Additionally, stored diagnostic trouble codes—such as internal SRS errors (e.g., DTC B1XXX or U1XXX)—cannot be cleared using a diagnostic tool. In some cases, the control unit becomes completely inaccessible via the OBD interface.

The primary and unmistakable symptom is the active airbag warning light. It indicates a critical system error and warns that the airbags would not deploy in the event of a crash, posing a significant safety risk.

During workshop diagnostics, it often becomes apparent that the control unit fails to respond to requests from diagnostic tools like TECH2 or other OBD scanners. This points to a severe internal fault or a communication problem on the CAN bus.

Another clear indicator is the presence of persistent diagnostic codes signaling an “internal control unit error” or “crash data stored.” These errors cannot be reset using standard workshop procedures and require specialized electronic repair.

In which vehicles is the 6545GP control unit installed?

The 6545GP airbag control unit is primarily installed in Peugeot vehicles. It is found mainly in the Peugeot 206 SW I, both in the early models from 1998 to 2003 and in the facelifted version from 2003 to 2009. It is also used in related vehicle platforms such as the Peugeot Partner II. At Airbag24, we specialize in repairing this control unit.

At Airbag24, we repair the 6545GP control unit for the following specific vehicle models:

Peugeot 206 SW I (model years 1998–2003)

Peugeot 206 SW I Facelift (model years 2003–2009)

Peugeot Partner II

How does the repair of the 6545GP proceed at Airbag24?

The repair process for the 6545GP control unit at Airbag24 follows a standardized procedure. After removal and shipment of the unit, a detailed electronic analysis is performed to identify root causes such as stored crash data or component defects. Subsequently, faults are corrected at the component level, restoring the device to like-new condition.

First, the defective control unit should be professionally removed from the vehicle and securely packaged for shipment to Airbag24. Our technicians begin with a comprehensive incoming inspection, during which all fault codes and stored data are read out.

The core of the repair involves erasing the crash data from memory and replacing any faulty electronic components, such as processors, memory chips, or capacitors. This restores full functionality without requiring re‑coding in the vehicle.

Following successful refurbishment, each control unit undergoes an intensive functional test on a specialized test bench. Only after passing all tests is the unit approved for return shipment. We provide 2 years' statutory liability for defects on every repair.