Description
Complete bundle of front seat heaters. It is the same for the left and right seat.
For PEUGEOT 307
cars
Including relay
Part description
This front seat heating wiring harness is for Peugeot 307 cars and includes a relay. Due to the fact that it is the same for both left and right seats, it is suitable as a replacement when repairing a non-functioning seat heater (e.g. after damage to the wiring or connectors).
For used electrical parts of this type, the key is to search by product numbers – we list them below for easy pairing with the old part.
Technical information
Product codes
- Product codes: 9451314, 6533QL
Installation recommendations
Generally/typically for the seat heater wiring harness, the exact wiring routing and access to the connectors may vary by vehicle and seat design. Consider the procedure below as a practical guide for this type of part.
1) Before assembly
- Compare the bundle with the old piece: codes 9451314 / 6533QL, connector types, their number and shape, branch lengths and the presence of a relay.
- Check for damaged pins in connectors, broken insulation, signs of overheating or home repairs.
- Verify that the relay is physically undamaged and that the connectors fit firmly into it.
2) Necessary tools and materials
- Basic set of hand tools (ordinary wrenches/ratchet depending on design)
- Plastic crowbar for upholstery/covers
- Flashlight
- Straps / textile tape for cabling (for fixing to the original routes)
- Contact cleaner for electrical connectors (optional)
3) Step-by-step assembly procedure
- Turn off the ignition and disconnect the battery (for wiring work).
- Give access to the seat and its wiring (typically by moving the seat and removing the necessary covers depending on the design).
- Document the original condition: take a photo of the wiring harness, handles and connector connections, so you don’t mess anything up during assembly.
- Disconnect the connectors of the old harness; pull out the connectors by the connector body, not by the cables.
- Release the harness from the holders/grips and remove it from its original route so as not to damage the surrounding wires.
- Clean and check the contacts of the connectors (if necessary, use a contact cleaner).
- Install the new harness in the same route as the original and fix it in all the mounts to prevent the wiring from fraying or pinching.
- Connect all the connectors as far as they will go and check that the latches click properly.
- Make sure that the wiring is not under tension in any position of the seat and that it does not interfere with moving parts anywhere.
- Reconnect the battery.
-
4) Post-assembly checks and test drive/function verification
- Check the function of the seat heater after switching on (the reaction may be slow).
- Check for harness tension or loss of function when moving the seat forward/backward.
- After a short ride, visually check again that the wiring is in place and that nothing is rubbing.
5) The most common assembly mistakes + how to avoid them
- Exchanging connectors → mark or take a picture of everything before disconnecting.
- Pinch of wiring when mounting covers/seat → always check cable routing before tightening.
- Insufficient fixation of the bundle → use the original handles and complete the fixation with tape/tapes.
- Pulling the wires out of the connector → pull the connectors by the body, not by the cables.
Reasons why the part is damaged
- Mechanical stress on the wiring when the seat moves (pull, bend, pinch).
- Insulation penetration by the structure of the seat or the edge of the plastic covers.
- Loose/oxidized connectors and transition resistors leading to hot contacts.
- Unprofessional interventions in the cabling (twisted connections, inappropriate repairs, poor insulation).
- Moisture and dirt in the connectors that deteriorate the contact.
