Description
Airbag Control Unit Autoliv for Peugeot 407
Overview
This Airbag Control Unit manufactured by Autoliv is designed for the Peugeot 407. It manages the Supplemental Restraint System (SRS), processing sensor inputs and triggering airbag deployment in the event of a collision. The unit is a critical safety component frequently searched by its OE and product codes, so listing the reference numbers below helps technicians and DIY enthusiasts find the exact replacement quickly.
Fitment
Intended for Peugeot 407 models. Often located inside the passenger compartment; on many vehicles the module is mounted under the passenger seat or beneath the centre console. Always verify physical match and connector layout when replacing.
Function And Symptoms
The Airbag Control Unit continuously monitors crash sensors, seat belt buckle switches and related inputs. When a qualifying crash is detected, it commands airbag deployment and records fault codes in the SRS memory. Common symptoms of a failing unit include an illuminated airbag/SRS warning lamp on the dashboard, intermittent SRS faults stored in the vehicle diagnostic system, or failure to clear crash memory after repairs.
Common Failure Reasons
- Activation After A Collision: The module is often rendered non-functional after airbag deployment during an accident and must be replaced.
- Water Ingress Or Corrosion: Moisture reaching connectors or the unit can damage electronics and cause faults.
- Electrical Surges Or Short Circuits: Battery issues or incorrect wiring during repairs can damage the control unit.
- Connector Damage Or Wiring Faults: Mechanical damage to plugs, pins or wiring can produce communication errors and false faults.
Replacement Procedure (General Guidance)
Recommended for professional technicians or experienced DIYers comfortable with SRS systems. Basic replacement steps:
- Disconnect The Negative Battery Terminal And Wait At Least 10 Minutes (Or Follow Manufacturer Interval) To Allow System Capacitors To Discharge.
- Remove Interior Trim Or Seat Components To Access The Module Location.
- Document And Photograph Wiring And Connector Positions Before Disconnecting To Ensure Correct Reinstallation.
- Unplug Connectors Carefully, Remove Mounting Fasteners And Replace With The New Unit.
- Reconnect Battery, Clear SRS Faults With A Diagnostic Tool According To Vehicle Procedures, And Confirm Proper System Operation.
Do Not Attempt To Open Or Repair The Module Internally. Follow All Safety Precautions Related To Airbag Systems To Avoid Accidental Deployment And Injury.
Maintenance And Lifespan
An airbag control unit typically does not fail from normal wear. Failures usually follow crash events, water damage, electrical faults or improper handling during repairs. When working on vehicles with SRS components, keep connectors dry and secure, and avoid jump-starting or direct battery voltage spikes near the control electronics.
Technical Information
- Manufacturer: Autoliv
- Model: Peugeot 407
- Product Codes: 9655880880, 603554600
- Other Numbers: 6545HY, 6545HZ
Search And Purchase Tips
Customers and workshops often search by OE numbers listed above (9655880880, 603554600) or by the shorter factory references (6545HY, 6545HZ). Use these codes to ensure you are ordering the correct SRS control unit for a Peugeot 407.
Installation Recommendations
- Use A Diagnostic Tool Capable Of Reading/Clearing SRS Codes After Replacement.
- Observe ESD Precautions When Handling The Module To Protect Sensitive Electronics.
- Ensure Mounting Hardware And Connectors Are Tight And Free From Corrosion.
- Follow Vehicle Manufacturer Torque Specs And Service Intervals When Reassembling Interior Trim.
Why This Part Is Often Replaced
The airbag control unit is most commonly replaced after a collision where airbags were deployed or when the module records irrecoverable faults due to water damage, electrical surges or connector failures. Replacing the unit and clearing crash memory is typically required to restore full SRS functionality.
