Description
Airbag control unit for CITROËN C8 and PEUGEOT 807. Fully functional.
This Airbag Control Unit (SRS Control Module) is designed for Citroën C8 and Peugeot 807 vehicles and is commonly referenced by part numbers 1400612380, 6546H0 and 6546H1. Designed for professional workshops and experienced DIY mechanics, this unit monitors crash sensors, manages airbag deployment logic and communicates SRS faults to the vehicle’s diagnostic system. If you search by part number to find a direct replacement, these identifiers increase the chance of a correct match.
Key Benefits
Reliable SRS signal processing and compatibility with original Stellantis Citroën/Peugeot wiring make installation straightforward for trained technicians. The unit restores proper airbag system diagnostics and is suitable for vehicles where the original control module is faulty or inoperative.
Function And Typical Failure Modes
The airbag control unit continuously evaluates input from crash sensors, seat occupancy sensors and seat belt pretensioner circuits to determine if and when to deploy restraint devices in a crash. It also stores fault and event memory (crash data) and illuminates the SRS warning lamp when faults are present.
Common causes of failure include damage from a prior collision (including internal deployment-related faults), water ingress and corrosion in connectors, electrical surges, poor grounding or wiring short circuits. In many cases the module itself remains usable after minor impacts, but connector corrosion or wiring faults are frequent culprits for SRS warning lights.
Compatibility And Application
Intended For: Citroën C8, Peugeot 807. Common Part Numbers: 1400612380, 6546H0, 6546H1. Manufacturer: Stellantis (Citroën/Peugeot systems).
Installation Recommendations
- Disconnect Negative Battery Terminal And Wait: Before starting work, disconnect the negative battery terminal and wait at least 10–15 minutes to allow the SRS capacitors to discharge.
- Handle With Care: Avoid impact, electrostatic discharge and exposure to moisture. Do not attempt to open the module housing.
- Connector Inspection: Inspect and clean vehicle connectors and wiring harness for corrosion or damage. Replace damaged pins or harness sections before installing the new unit.
- Mounting: Secure the unit using original mounting points and torque fasteners to manufacturer specifications to avoid vibration-related faults.
- Post-Installation: Use an OBD diagnostic tool capable of SRS functions to clear stored fault codes and confirm system readiness. Some repairs may require initialization procedures or fault memory deletion using manufacturer-level diagnostic equipment.
Why This Part Fails Most Often
Airbag control units commonly fail following vehicle collisions (deployment events), but non-collision failures are frequently caused by moisture/corrosion in connectors, electrical shorts or poor ground connections. Prolonged exposure to damp environments or previous improper electrical repairs can accelerate failure.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C8 / Peugeot 807
- Product Codes: 1400612380, 6546H0
- Additional Numbers: 6546H1
Note For Mechanics: When replacing an SRS control module, always follow vehicle manufacturer service procedures and use appropriate diagnostic tools to verify system integrity. Correct installation and a proper diagnostic check ensure that the airbag system will function correctly and that no residual faults remain.
