Airbag control unit with part number 9645341980

What is the function of the airbag control unit 9645341980?

The airbag control unit with part number 9645341980 is the central control module for the occupant safety system (SRS) in the Peugeot 206 SW I. It continuously analyzes data from the crash sensors and is responsible for precisely and reliably deploying the airbags and seatbelt pretensioners in the event of a collision.

As the heart of the safety system in the Peugeot 206 SW I (model years 1998–2003, as well as the facelift version from 2003–2009), this control unit manages and monitors all components of the passive restraint system.

It is compatible with several alternative part numbers that serve the same function in related Peugeot models. These include numbers 9650136780, 9658284980, 9652275880, 9643082380, 6547WJ, 6556N9, and 6545GP.

Why does the control unit 9645341980 fail?

A failure of the control unit 9645341980 is most commonly caused by stored crash data following an accident, which locks the device. Other causes include internal electronic malfunctions, broken wiring, or faulty connectors that impair communication and functionality.

The most frequent cause of malfunction is the storage of crash data. After a collision, the control unit self‑locks for safety reasons to prevent unintended secondary deployment. This condition is recorded in the fault memory and must be professionally reset.

In addition to crash‑data locking, purely electronic defects on the circuit board can also occur. These include errors in the internal memory or other electronic components, leading to complete system failure.

Mechanical damage such as defective connectors or wiring faults are also potential sources of failure, requiring careful diagnosis at a workshop to minimize safety risks.

How do you recognize a defect in the control unit 9645341980?

A defect in the airbag control unit 9645341980 typically manifests unmistakably through a permanently illuminated or flashing SRS warning light on the instrument cluster. This indicates that the entire airbag system is deactivated and no longer provides protection in the event of a crash.

The primary and most obvious sign is the active airbag warning light. It fails to extinguish after starting the vehicle, signaling a serious system error that requires immediate inspection.

As a result of the defect, the airbags and seatbelt pretensioners are completely inoperative. The vehicle no longer offers its intended occupant protection during a collision, posing a significant safety risk. An immediate check at a specialized workshop is therefore essential.

In which vehicles is the control unit 9645341980 installed?

The part number 9645341980 is specifically designed for the Peugeot 206 SW I and is used in both the 1998–2003 models and the facelift version from 2003–2009. Due to compatibility with other part numbers, the underlying technology may also appear in additional Peugeot models.

At Airbag24, we repair the control unit 9645341980, which is primarily installed in the following vehicle model:

Peugeot 206 SW I (model years 1998–2003) as well as in the facelift model (model years 2003–2009).

How is the control unit 9645341980 professionally repaired?

At Airbag24, repairs follow a strict protocol: Upon receipt, the control unit undergoes precise diagnostics to pinpoint the root cause of the issue. Next, crash data is reset, internal electronic faults are corrected, and defective components are replaced. A final calibration ensures full functionality.

Before removing the unit, a diagnostic check should first be performed on the vehicle to rule out external causes such as faulty sensors or wiring problems.

After sending the unit to Airbag24, it is read using specialized tools to identify the exact cause—whether it’s a stored crash entry, an internal hardware fault, or a damaged connector.

The repair process includes carefully resetting crash data or replacing faulty electronic components on the circuit board. The unit is then recalibrated so it functions like new again.

We provide 2 years’ statutory liability for defects on every repair, underscoring the quality and durability of our workmanship.