This airbag control unit (SRS/Restraint Control Module) is suitable for Citroën C8 and Peugeot 807 models and is listed under part numbers 1400987180, 6546H0 and 6546H1. Engineered for professional workshops and experienced DIY mechanics, this unit replaces a faulty SRS brain to restore proper airbag system operation, clear crash flags and allow secure deployment in the event of an accident. Clear product codes in the description make it easy to find on search engines and in parts catalogs.

Technical Information

• Manufacturer: Stellantis
• Model: Citroën C8; Peugeot 807
• Product Codes: 1400987180, 6546H0, 6546H1
• Additional Numbers: 6546H0 / 6546H1 (cross-references)

Function And Role

The airbag control unit continuously monitors crash sensors, seatbelt pretensioners and passenger occupancy signals. In a collision, it evaluates sensor inputs and issues the deployment command to the airbags and pretensioners. It Also Stores Crash Data And Diagnostic Trouble Codes That Are Readable With A Diagnostic Tool, Which Helps Determine System Status After An Event.

Common Failure Causes

• Impact Or Previous Collision That Triggered Deployment Or Set Crash Flags.
• Electrical Issues: Short Circuits, Connector Corrosion Or Damaged Wiring Harnesses.
• Moisture Ingress Or Water Damage Leading To Internal Corrosion Or Electronic Faults.
• Aging Electronics: Faulty Components Or Loss Of Calibration Over Time.
• Improper Repairs Or Aftermarket Interference That Affect Signal Integrity.

Installation Recommendations

• Safety First: Disconnect The Negative Battery Terminal Before Any Work And Wait At Least 10 Minutes To Allow SRS Capacitors To Discharge.
• Handle With Care: Avoid Dropping The Unit Or Exposing It To Moisture. Do Not Open Or Attempt To Repair The Module Internally.
• Removal: Remove Required Trim Panels To Access The Unit, Unplug Electrical Connectors Using Proper Release Tools, Then Unbolt The Module From Its Mounting Points.
• Fitment: Install The Replacement Unit In The Correct Orientation, Secure Bolts To Original Positions And Reconnect All Plugs Ensuring Firm Contact.
• Diagnostics And Reset: After Installation Use A Qualified Diagnostic Tool To Read And Clear Fault Codes, Confirm Airbag System Integrity And Perform Any Required Calibration Or Relearning Procedures.
• Verification: Confirm That The Airbag Warning Light Behaves Normally (Illuminates On Key-On Self-Test Then Switches Off) Before Returning The Vehicle To Service.

This listing is optimized for technicians and car owners who search by part number (1400987180, 6546H0, 6546H1) or by model (Citroën C8, Peugeot 807). Replacing the airbag control unit with the correct code helps restore safety system functionality and ensures the restraint system operates as designed.

Provide your CITROËN C8 or PEUGEOT 807 with a high-quality used airbag control unit that guarantees reliable operation of your vehicle’s airbags. This unit is essential for the proper functioning of the car’s safety systems and is specifically designed for the CITROËN C8 and PEUGEOT 807 models. It ensures that airbags deploy correctly and immediately in the event of an accident, potentially saving lives.

Replacement of this unit is recommended to be carried out by a professional mechanic to ensure correct functionality and compatibility with the vehicle’s electrical system.

Technical Information:

Manufacturer: PSA Citroën Peugeot
Model: CITROËN C8, PEUGEOT 807
Product Codes: 1401277280, 6546H0, 6546H1
Additional Numbers: marked on the product

Investing in a properly functioning airbag control unit is crucial not only for your safety but also for maintaining the overall value of your vehicle. Purchasing this quality used and operational unit offers you a reliable product at a fraction of the cost of a new part.

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.

The module manages the deployment of airbags during a collision, a critical function for occupant safety. Failure of this unit can compromise airbag operation, posing significant risks. Typical causes of failure include electrical faults, sensor errors, or impact damage. Replacement is straightforward and can be performed by experienced car owners or professional mechanics. Proper installation is essential to ensure the module communicates correctly with the vehicle’s crash sensors and airbag units.

Technical Information

Manufacturer: PSA Citroën Peugeot
Models: Citroën C8, Peugeot 807
Product Codes: 1400684780, 6546H0, 6546H1
Additional Numbers: None available

This Airbag Control Module is specifically designed for use in Citroën C8 and Peugeot 807 models. To guarantee compatibility, verify the product codes with your vehicle’s existing unit before purchase. Precise matching ensures the correct fit and functionality for your airbag system.

By choosing this airbag unit, you benefit from a component that meets the stringent safety requirements of PSA Group vehicles. Our support team is ready to assist with any technical questions or guidance needed during installation. Protect your vehicle and passengers by ensuring your airbag system is fully operational.