Description
Airbag and seat heating wiring harness for driver seat for Peugeot 308 T7
This wiring harness integrates the airbag (SRS) circuit and the electric seat heating connection for the driver seat of Peugeot 308 (T7). Designed as an OEM-fit wiring assembly, it routes power and signal lines between the seat modules, occupant detection sensors, and the vehicle harness, ensuring correct functioning of the seat heater and airbag circuit. Ideal for professional workshops and experienced DIY mechanics looking for a direct replacement part by part numbers 4424719AF and 6509V8.
Technical Information
- Manufacturer: Stellantis / Peugeot
- Model: Peugeot 308 (T7) – Driver Seat
- Product Codes: 4424719AF, 6509V8, 6509.V8
- Additional Numbers: 4424719AF; 6509V8
Function
The harness transmits power to the seat heating element and carries the SRS airbag circuit signals, including connections to seatbelt buckle sensors and occupant detection modules where applicable. A properly functioning harness is essential to avoid SRS fault warnings and to ensure the seat heater operates safely and reliably.
How The Part Is Replaced
Typical replacement requires removal of the driver seat to access the under-seat connectors and the routing of the harness along the seat frame. General steps:
- Disconnect the negative battery terminal and wait at least 10 minutes to discharge capacitors and reduce SRS risk.
- Remove trim panels and unbolt the driver seat from the vehicle floor; carefully move the seat to gain access to underside connectors.
- Disconnect all connectors related to the harness (SRS, seat heating, occupant sensors). Mark connectors if needed to ensure correct reassembly.
- Remove the old harness, route the replacement harness following original clips and grommets, and reconnect all plugs firmly.
- Reinstall the seat, reconnect the battery, and use a compatible diagnostic tool to check and clear any SRS or seat-heating fault codes and verify system operation.
Installation Recommendations
- Always disconnect the battery before working on SRS circuits and wait an appropriate amount of time (min. 10 minutes) to avoid accidental deployment.
- Inspect seat rail grommets and clip points for sharp edges or corrosion that may abrade the new harness; replace or protect as necessary.
- Ensure all SRS connectors are fully seated and locked—poor connections can trigger airbag warnings or disable systems.
- After fitting, verify the airbag system and seat heater operation with a suitable diagnostic tool and clear any persistent fault codes.
- Use genuine-style connectors and crimps if any repair is needed; avoid splicing without proper insulation and strain relief.
Why The Part Most Commonly Fails
- Mechanical Fatigue: Repeated seat movement causes wires to flex at anchor points, eventually leading to broken conductors or cracked insulation.
- Connector Damage: Connectors under the seat can be crushed, corroded, or contaminated by moisture and dirt, producing intermittent faults.
- Collision Damage: Impact events often deform seat frames and harness routing, severing or stretching the wiring.
- Previous Repairs or Improper Routing: Poorly executed splices or unsecured routing accelerate wear.
- Environmental Factors: Moisture ingress and corrosion reduce connector reliability and can short circuits in the heating circuit.
Common symptoms of a failing harness include SRS warning light on the dashboard, loss or intermittent operation of the seat heater, and diagnostic trouble codes related to seat occupancy or airbag circuits. There is no fixed replacement interval—lifespan depends on vehicle use, seat movement frequency, and environmental exposure.
Part numbers 4424719AF and 6509V8 are frequently used search terms; supplying these codes in your order helps ensure you receive the correct driver-seat airbag and heating wiring harness for Peugeot 308 (T7). This item is aimed at professional mechanics and informed DIYers experienced with SRS systems and seat electronics.
