Description
Left Front Seat Belt, Pyro Seat Belt, Driver’s Belt for Peugeot 407. Color FXX Black.
This left front pyro seat belt assembly is designed for the Driver’s position on Peugeot 407 vehicles and integrates a pyrotechnic pretensioner for rapid restraint in an impact. Ideal for professional workshops and experienced DIYers, the unit is commonly searched by its part numbers and offers a direct replacement to restore the vehicle’s occupant restraint performance after wear or collision. Fitment by qualified personnel is recommended due to the integrated SRS (Supplemental Restraint System) components.
Technical Information
- Manufacturer: Peugeot (Stellantis)
- Model: Peugeot 407
- Product Codes: 96439575XX, 8974HG
- Other Numbers: NFP
Compatibility And Fitment
Intended for the Left Front (Driver) seat of Peugeot 407 models. Always confirm the part number against the vehicle’s existing belt assembly when possible. This assembly is typically used on standard Peugeot 407 variants—check physical match to mounting points and connector type before final installation.
Function And Performance
The unit combines the lap/shoulder webbing, retractor mechanism and a pyrotechnic pretensioner. During a significant frontal or near-frontal impact the pretensioner activates to remove slack from the belt instantly, improving occupant restraint and working together with airbags to reduce injury risk. The retractor provides normal belt locking under sudden deceleration and allows free movement during normal use.
Typical Failure Modes And Why They Occur
- Deployment: The pretensioner is a single-use pyrotechnic device and will be non-functional after activation in a crash.
- Corrosion and Moisture: Water ingress or corrosion at mounting points and connectors can cause electrical or mechanical failure of the retractor/pretensioner.
- Wear And Damage: Webbing abrasion, fraying, or damage from improper routing reduce effectiveness and require replacement.
- Connector/Wiring Faults: Damaged SRS connectors or wiring can prevent pretensioner activation or trigger warning lights.
Replacement Procedure And Recommendations
Safety First: The pretensioner is a pyrotechnic component. Before any work, disconnect the vehicle battery and wait at least 10 minutes (or follow the vehicle manufacturer’s recommended waiting time) to allow the SRS system to discharge. Use appropriate personal protective equipment and avoid exposing the unit to heat, impact or open flame.
- Disconnect battery and secure vehicle.
- Remove interior trim panels and seatbelt covers to access the retractor, anchor and buckle fixation points.
- Unplug electrical connector for the pretensioner—handle connectors carefully and avoid pulling on wires.
- Remove mounting bolts securing the retractor and lower anchor. Keep track of any washers or spacers.
- Fit the new assembly in the correct orientation, ensuring the webbing routing matches the original installation.
- Tighten mounting bolts to the vehicle manufacturer’s torque specification and reconnect the electrical connector securely.
- Reinstall trim, reconnect the battery and verify SRS system status with an appropriate diagnostic tool. Clear any fault codes only after addressing the root cause.
Use new mounting hardware if the manufacturer specifies one-time-use bolts. Never attempt to modify or disassemble the pretensioner. After a collision where the pretensioner has fired, the entire assembly must be replaced.
Installation Advice For Mechanics And Experienced DIYers
This replacement is suitable for professional workshops and experienced home mechanics who have SRS knowledge. Ensure you have the correct tools and, if available, a diagnostic scanner to confirm SRS integrity after installation. Keep the belt routed exactly as the original and check that the buckle and locking mechanism operate smoothly before returning the vehicle to service.
Why Choose This Part
Buying the correct left front pyro seat belt restores proper occupant protection and helps ensure the SRS functions as designed. Customers searching by part numbers 96439575XX or 8974HG will find direct-fit compatibility and a solution intended to match the original assembly used on Peugeot 407 vehicles.
