Airbag control unit with part number 9632167780

What is the function of the airbag control unit 9632167780?

The airbag control unit with part number 9632167780 is the central control module of the occupant safety system (SRS) in the Citroën Xsara Picasso I. Manufactured by Autoliv (reference number 550776300), it processes data from crash sensors and, within milliseconds, determines whether to deploy airbags and tighten seat belts to protect vehicle occupants in the event of a collision.

As an original replacement part from PSA (Peugeot/Citroën), this module is precisely matched to the Xsara Picasso’s vehicle architecture. It continuously monitors all connected components of the airbag system, including front and side airbags, seat belt pretensioners, as well as their associated sensors and wiring. Any irregularity in the system is recorded as a fault code in its internal memory, triggering the activation of the airbag warning light on the instrument panel.

What types of failures occur in control unit 9632167780?

The most common causes of failure for control unit 9632167780 are stored crash data following an accident that prevents further operation, along with internal hardware faults in the EEPROM memory. Voltage fluctuations in the vehicle’s electrical system—such as those caused by a weak battery—can also lead to data corruption and board-level defects.

A primary and very frequent reason for repair is the storage of crash data. After a collision, the unit writes irreversible error codes into its memory, effectively locking down the entire airbag system. Reactivation is only possible through a targeted reset performed by a specialist.

Another typical defect is an internal control unit malfunction. Diagnostic tools often display a fault code indicating a problem directly within the device itself, frequently due to faulty memory chips (EEPROM) or other electronic SMD components on the circuit board. Such issues can even arise spontaneously, without any prior accident.

Voltage problems in the vehicle—such as undervoltage or overvoltage during startup—can likewise damage the control unit’s sensitive electronics, potentially resulting in corrupted configuration data or failure of onboard voltage regulators.

It is also important to verify whether the issue lies in the vehicle’s wiring harness. Defective connectors, especially under the front seats connecting to seat belt pretensioners or side airbags, are a well-known source of trouble. The control unit records these external faults but remains intact in such cases.

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

The clearest symptom of a fault in the airbag system is the permanently illuminated airbag warning light on the dashboard. Additional indicators include specific fault codes pointing to an internal defect in the control unit, or the inability to clear fault codes after an accident.

The red airbag warning lamp that fails to extinguish after starting the vehicle is the most obvious sign, signaling that the safety system is not operational and would not deploy in the event of a crash.

When reading the fault memory with a diagnostic tool, codes such as “control unit defective” or errors related to problems with the internal memory (EEPROM) appear, directly indicating a hardware fault within the module.

Following an accident, the crash record stored in the control unit cannot be erased using standard workshop testers. The system remains locked, and the warning light stays on continuously—even if all external airbag components have been replaced.

In which vehicles is control unit 9632167780 installed?

The airbag control unit with PSA part number 9632167780 and Autoliv reference 550776300 is exclusively used in the first-generation Citroën Xsara Picasso, encompassing both the original version and the later facelift model. Repair is only possible when the part number matches exactly.

At Airbag24, we repair control unit 9632167780 for the following models:

Citroën Xsara Picasso I (model years approx. 1999–2004)

Citroën Xsara Picasso I Facelift (model years approx. 2004–2010)

For successful repair and full compatibility, it is essential that the part number on your removed control unit exactly matches either 9632167780 or 550776300.

How does the repair process for control unit 9632167780 work?

The repair process at Airbag24 begins with removing and shipping the defective control unit. Following precise diagnostics on the test bench, professional electronic refurbishment is carried out at the component level. A final functional test simulates operation inside the vehicle, ensuring the quality of the repair.

First, the control unit must be professionally removed from the vehicle, which requires the battery to be disconnected without fail. Afterwards, please ship the unit securely packaged to Airbag24.

Upon receipt of the unit, our technicians will conduct a thorough analysis to determine the exact cause of the fault. This includes reading out the fault memory and any available crash data, as well as inspecting the electronic circuits.

The repair is performed at the component level. Depending on the defect, crash data is reset, faulty memory chips (EEPROM), processors, or other SMD components are replaced, and solder joints are reworked. The goal is to restore full factory functionality.

Finally, the repaired control unit is tested on a specialized simulator that replicates all vehicle sensors and ignition circuits to ensure flawless operation. You receive 2 years' statutory liability for defects on the completed repair.