Description
Electric lock for the left front (driver’s) door for PEUGEOT 407.
High-quality electric left front door lock designed for Peugeot 407 vehicles. This direct-fit actuator/latch assembly restores reliable central locking and mechanical latching on the driver’s door. Ideal for professional garages and competent DIY enthusiasts who need a durable replacement part that fits OE specifications. Frequently searched by part numbers 9686683680, 9135AY and 9135FN, this unit replaces faulty actuators that cause intermittent locking, stuck doors or failure to secure the vehicle.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Peugeot 407 (Sedan / SW / Coupe — check vehicle application years and trim)
- Product Codes: 9686683680, 9135AY, 9135FN
- Other Numbers: Commonly listed under the above OEM references and compatible replacement listings for Peugeot 407 driver door lock assemblies
Function And Benefits
The door lock assembly integrates the mechanical latch and the electric actuator used by the central locking system. It secures the door in the closed position, provides lock/unlock drive when commanded by the central locking module or remote, and includes mechanical linkages for internal handles and safety catch. Replacing a worn or failed unit restores smooth locking operation, eliminates unusual noises during locking/unlocking, and prevents doors from failing to latch or unlocking unexpectedly.
Replacement Procedure (Overview)
Recommended for qualified mechanics and experienced DIYers. Typical replacement steps:
- Disconnect the vehicle battery before starting to avoid short circuits and prevent central locking faults.
- Remove the interior door panel and any trim needed to access the lock (retain clips and screws).
- Peel back the moisture barrier carefully to access the lock assembly and electrical connector.
- Disconnect the wiring plug and detach the mechanical rods/linkages from the lock.
- Unbolt the lock assembly from the door, fit the new unit, reattach rods and wiring, and secure fasteners to correct torque.
- Test central locking, remote operation, manual lock/unlock and door handle function before refitting the door card. Refit moisture barrier and interior trim.
Installation Recommendations
- Always disconnect the battery before removal/installation and follow manufacturer safety procedures.
- Keep fasteners, clips and trim organized to ensure proper reassembly. Replace any damaged clips or sealant to maintain moisture protection.
- Inspect and, if necessary, lubricate striker, latch surfaces and linkage pivot points with a suitable light grease to reduce wear and noise.
- After fitting, confirm that the door aligns and latches smoothly; adjust the striker if the door does not close correctly.
Most Common Failure Causes
- Water ingress and corrosion due to damaged moisture barrier or worn seals causing motor or contacts to fail.
- Wear of internal plastic gears or actuator motor after many years of use, producing grinding or no movement.
- Broken or detached mechanical linkages and clips that prevent the latch from moving correctly.
- Electrical connector corrosion, wiring fatigue or intermittent contact producing erratic locking behavior.
- Mechanical wear from repeated heavy use or impact/misalignment of the door striker.
Troubleshooting Tips
- If only one door fails, check the connector, wiring and fuses for that circuit before replacing the lock unit.
- Listen for motor noise when actuating lock; no sound may indicate a failed actuator or lost power to the connector.
- Intermittent operation often points to corroded contacts, water damage or worn internal gears rather than a central locking module fault.
Part Number Keywords For Search: 9686683680 / 9135AY / 9135FN — commonly used by technicians and DIY customers when sourcing the left front (driver’s) door lock for Peugeot 407 models.
