Description
Pyrotechnic Seat Belt For Citroën C4 Picasso Or C4 Grand Picasso – Left Front Seat (Driver)
Upgrade or replace a critical safety component with this genuine-style pyrotechnic seat belt pretensioner designed for the left front (driver) seat of Citroën C4 Picasso and C4 Grand Picasso models. The unit instantly tightens the lap and shoulder belt during a severe impact to reduce occupant movement and improve airbag timing. Ideal for professional workshops and experienced DIY mechanics who routinely service PSA/Stellantis vehicles. Common search terms include the OE references 9657326377 and 8974XZ, making this listing easy to find for targeted repairs.
Key Benefits
High-value safety replacement for post-collision repairs or SRS system fault resolution. Restores pretensioner function to improve occupant protection in a subsequent collision. Compatible with original mounting and electrical connectors for straightforward integration into the vehicle wiring harness.
How It Works
The pyrotechnic pretensioner contains a small pyrotechnic charge that, when triggered by the airbag control unit during a detected crash event, rapidly retracts the belt webbing to remove slack. This action positions the occupant more effectively for airbag deployment and seatbelt load distribution. Pretensioners are single-use devices and must be replaced after deployment.
How To Replace (Overview)
- Disconnect Battery: Always disconnect the negative battery terminal and wait at least 10 minutes to allow SRS capacitors to discharge before starting work.
- Remove Trim: Carefully remove seat trim and plastic covers to access the buckle/pretensioner assembly. Keep fasteners and trim clips for reinstallation.
- Unplug Connector: Locate and disconnect the pretensioner electrical connector. Inspect the connector and wiring for corrosion or damage.
- Unbolt Assembly: Remove mounting bolts securing the pretensioner to the seat structure. Replace the unit with correct orientation.
- Reinstall And Torque: Refit bolts and trim. Follow manufacturer torque specifications and resecure all clips.
- SRS System Reset: After physical replacement, clear SRS fault codes and verify system status with a diagnostic tool. A full scan ensures the airbag indicator lamp is extinguished and the system is functional.
Installation Recommendations
- Work Should Follow Manufacturer Procedures: Use the vehicle manufacturer’s instructions and torque values where specified.
- Safety First: Treat the pretensioner as an explosive safety device—handle with care and avoid impacts to the unit.
- Diagnostic Check Recommended: Use a compatible diagnostic tool (DiagBox/PP2000/Lexia or equivalent) to clear codes and confirm SRS system integrity after replacement.
- Professional Fitment Advised For Uncertainty: If you are not experienced with SRS components, have a trained technician perform the replacement.
Why This Part Fails Most Often
- Deployment In A Collision: Pretensioners Are Single-Use And Must Be Replaced After Activation.
- Electrical Faults Or Connector Corrosion: Moisture Ingress Or Damaged Wiring Can Cause SRS Faults That Disable The Pretensioner.
- Previous Improper Repairs: Incorrect Reinstallation Or Aftermarket Modifications Can Prevent Proper Operation.
- Age-Related Degradation: While Not Common Without Deployment, Long-Term Exposure To Harsh Conditions Can Affect Connectors And Mounts.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 Picasso, C4 Grand Picasso (Left Front – Driver)
- Product Codes: 9657326377, 8974XZ
- Additional Numbers: 8974XZ
Note
This part is intended as a direct replacement for the left front pretensioner on compatible Citroën C4 Picasso variants. Always follow safe handling procedures for SRS components and verify system status with a diagnostic scan after replacement to ensure full vehicle safety functionality.
