Description
Autoliv Airbag Unit For Peugeot 407. Fully Functional.
This Autoliv airbag control unit (SRS ECU) is intended for Peugeot 407 vehicles and carries original equipment codes commonly searched by professionals: 9654717280, 603554600, 6545HY, 6545HZ. The module monitors crash sensors and seatbelt pretensioners, stores fault and crash data, and triggers airbag deployment in the event of a collision. It is suited for automechanics and experienced DIYers looking for a direct-fit replacement for the vehicle’s occupant restraint control.
Technical Information
- Manufacturer: Autoliv
- Model: Peugeot 407
- Product Codes: 9654717280, 603554600
- Additional Numbers: 6545HY, 6545HZ
Compatibility
Compatible with Peugeot 407 models equipped with the Autoliv SRS system. Use the listed product codes to match the unit to the vehicle’s original ECU. Confirming the code printed on the existing module ensures correct fitment.
Function And Typical Failure Modes
The airbag control unit continuously evaluates inputs from impact sensors, seat occupancy sensors and belt pretensioners. On detecting a qualifying impact, it sends deployment commands to the relevant restraint devices and logs event data to the control unit memory.
Common Causes Of Failure:
- Collision Event: Module can be damaged or store non-clearing crash data after an impact.
- Water Ingress Or Corrosion: Moisture in the cabin or poor sealing can corrode connectors or internal electronics.
- Electrical Surges Or Short Circuits: Faulty wiring, jump-starts or battery issues can damage internal components.
- Connector Damage Or Poor Contact: Broken pins or contaminated plugs lead to intermittent faults and error codes.
Replacement Procedure
Basic Steps For Mechanics And Experienced DIYers:
- Disconnect Negative Battery Terminal And Wait: Remove negative battery cable and wait at least 10–15 minutes to allow SRS capacitors to discharge before touching the unit.
- Locate The Unit: The ECU location varies by vehicle specification; it is commonly installed in the passenger compartment (under the center console, under the passenger seat or behind the glove box). Remove any trim panels or mounts to access the module.
- Carefully Unplug Connectors: Release locking tabs and unplug wiring harnesses. Inspect connectors and wiring for damage or corrosion.
- Replace Unit And Reconnect: Fit the replacement unit in the original position and reconnect harnesses securely.
- Diagnostic Reset: Use an SRS-capable diagnostic tool to clear fault memory and verify system status. Ensure the airbag warning lamp extinguishes and no active SRS faults remain.
Installation Recommendations
- Follow Safety Precautions: Always disconnect the battery and wait the recommended time before starting work to avoid accidental deployment.
- Use Proper Diagnostic Tools: Clearing crash data and resetting the airbag light typically requires a professional SRS diagnostic scanner.
- Inspect Connectors And Wiring: Repair any damaged pins, harness insulation or corroded contacts before installing the new unit.
- Secure Mounting: Ensure the unit is mounted exactly as the original to avoid vibration-related faults.
Lifespan And Reliability
Airbag control units are designed to last for the life of the vehicle under normal conditions. Failures are relatively rare and are most often associated with prior collisions, water damage, or electrical faults. Replacing the module without addressing root causes (corroded connectors, leaking seals, or wiring shorts) may result in recurring faults.
Why Choose This Unit
This Autoliv unit carries original equipment references commonly used in workshop searches, making it a practical option for technicians who need a direct replacement part with known product codes. Proper installation and post-replacement diagnostics will restore correct restraint system operation.
