Description
Left Front Seat Belt, Pyrotechnic Pretensioner, Driver’s Belt for Peugeot 407. Color FXX Black.
This left front driver’s seat belt with integrated pyrotechnic pretensioner is intended for Peugeot 407 models and is identified by OEM-related codes 96439575XX and 8974HG. Designed for professional workshops and competent DIY mechanics, this belt restores occupant restraint performance after damage or deployment. Suitable keywords for searches: Peugeot 407 seat belt, left front belt, pyro pretensioner, 96439575XX, 8974HG.
Technical Information
- Manufacturer: Stellantis (Peugeot/Citroën)
- Model: Peugeot 407 (Saloon / SW / Coupé)
- Product Codes: 96439575XX, 8974HG
- Additional Numbers: NFP
- Position: Left Front (Driver’s Side)
- Color: FXX Black
Function And Application
The unit is a primary occupant restraint device combining a webbing belt, retractor and a pyrotechnic pretensioner. In the event of a severe impact the pretensioner rapidly winds the belt to remove slack and improve occupant restraint, reducing forward movement. The pyrotechnic element is single-use: once deployed it must be replaced.
Replacement Procedure (General Guide)
Removal and installation should be performed by trained personnel or experienced DIY mechanics following safety precautions. General steps:
- Disconnect the battery negative terminal and wait at least 15 minutes to allow the SRS system to discharge.
- Remove trim panels and access the B-pillar/seat anchorage as required to reach mounting bolts and electrical connector for the pretensioner.
- Carefully disconnect the pretensioner electrical connector; avoid pulling on wiring. Remove the belt assembly mounting bolts.
- Fit the new belt assembly in the correct orientation, connect the electrical connector securely and torque mounting bolts to the manufacturer’s specified values.
- Reinstall trim, reconnect the battery and clear SRS fault codes with an appropriate diagnostic tool if necessary. Verify correct retraction and locking function before returning the vehicle to service.
Installation Recommendations
- Always follow vehicle manufacturer’s service manual for specific instructions and torque settings.
- Observe SRS safety procedures: disconnect battery and wait the recommended time to avoid accidental deployment.
- Handle the pyrotechnic pretensioner connector and wiring carefully; avoid contamination, crushing or exposure to moisture.
- Do not attempt to reuse a belt or pretensioner that has been deployed, cut, frayed or shows signs of impact damage.
- After fitting, confirm that the belt retracts smoothly and locks under a sharp tug; check for SRS warning lights and clear codes with a scanner if needed.
Why This Part Fails
Common causes of seat belt failure include:
- Deployment During A Collision: The pyrotechnic pretensioner is single-use and must be replaced after any activation.
- Mechanical Wear And Damage: Webbing can fray, cut or become contaminated, reducing effectiveness.
- Retractor Malfunction: Springs, locking mechanisms or inertia reels can seize or lose function after contamination or age.
- Corrosion And Moisture Ingress: Electrical connectors and pyrotechnic components can be compromised by water or corrosion, especially in vehicles exposed to damp conditions.
- Improper Previous Repairs: Incorrect installation or reuse of deployed components can lead to premature failure or SRS faults.
Replace this left front belt whenever it shows visible damage, after pretensioner deployment, or if the retractor or locking function is impaired. Correct replacement restores full occupant protection and ensures compliance with safety standards.
