Description
Airbag and heated-seat wiring harness for the driver’s seat for Peugeot 308 T7
This high-quality wiring harness services both the SRS airbag circuit and the heated-seat elements for the driver’s seat on Peugeot 308 (T7). Ideal for professional workshops and experienced DIY mechanics, the harness replaces the original seat loom to restore airbag system integrity and seat heating functionality. Common search terms include Peugeot 308 wiring harness, airbag harness 4424719AF, heated seat harness 6509V8 and driver seat loom – include these OEM codes when sourcing replacement parts.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot OEM)
- Model: Peugeot 308 (T7) – Driver’s Seat
- Product Codes: 4424719AF, 6509V8
- Additional Numbers: 4424719 AF; 6509 V8
Function And Symptoms
The harness carries the airbag (SRS) circuit and the heated-seat wiring from the vehicle body to the driver’s seat. It ensures electrical connection for the driver’s airbag, seatbelt pretensioner (where fitted), seat occupancy sensor signals and seat heating elements. Typical failure symptoms include a persistent airbag warning light on the dashboard, loss of seat heating, intermittent heater operation, and diagnostic fault codes relating to SRS circuits or seat sensor open/short circuits.
Installation Recommendations
- Safety First: Disconnect the negative battery terminal and wait at least 10 minutes before starting work to allow SRS capacitors to discharge.
- Seat Access: Move the seat to its extreme fore/aft positions to access fixings and trim. Remove seat trim panels carefully to expose connectors and the harness routing.
- Mark Connectors: Note or mark connector positions and orientations before disconnecting. Airbag connectors are typically colour-coded (often yellow); handle them with care and avoid pulling on wires.
- Unbolt Seat If Necessary: Support the seat when removing bolts. If the harness runs through the seat base or rails, unbolt the seat to gain full access and avoid strain on the wiring.
- Replace Harness: Route the new harness following the original path, secure with clips, and ensure no pinching or abrasion points at seat rails or sharp edges.
- Reconnect And Verify: Reconnect all plugs, tighten fasteners to manufacturer torque values, refit trim, reconnect the battery and use a diagnostic tool to read/clear SRS or seat-related fault codes and verify proper operation of airbag and heating circuits.
- General Advice: Use proper ESD precautions and avoid exposing connectors to moisture. Replace damaged clips or grommets to maintain correct routing and protection.
Reasons The Part Fails Most Often
- Mechanical Fatigue: Repeated seat movement causes wire flexing and eventual breakage, especially where the harness passes over seat rails or pivot points.
- Abrasion And Pinching: Poor routing, missing clips or damaged grommets allow chafing against metal edges, leading to exposed conductors and intermittent faults.
- Corrosion And Contamination: Moisture ingress and corrosion in connectors can interrupt circuits, particularly in vehicles exposed to wet or salty environments.
- Damage From Previous Repairs Or Accidents: Improper disassembly/assembly or impact from a collision can stretch, crush or break the harness or connectors.
- Connector Wear Or Poor Contact: Oxidation or bent pins inside connectors causes poor electrical contact for airbag and heating circuits.
Notes For Mechanics And DIYers
This harness is an electrical safety-related component. Only qualified technicians or experienced DIYers with an understanding of SRS systems and proper safety procedures should perform replacement. After installation, verify SRS system status with an appropriate diagnostic tool and resolve any recorded codes before returning the vehicle to service.
