Description
Left front door lock for Peugeot 407. Driver’s door.
Replacement Left Front Door Lock designed for Peugeot 407 models, matching OEM reference numbers to restore secure locking, smooth latch operation and reliable central locking response. Ideal for professional mechanics and experienced DIY enthusiasts performing door lock repairs or replacements. The unit restores mechanical locking and electric actuation where applicable and is commonly searched by part numbers such as 9659739880, 9135AY and 9135FN — include these in your search to find the exact match quickly.
Technical information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Peugeot 407
- Product Codes: 9659739880
- Other Numbers: 9135AY, 9135FN, F 00
Function And Common Use
The lock assembly secures the driver’s door, engages the latch when the door is closed and operates with the central locking system and mechanical key. It contains the latch mechanism and, where fitted, the electric actuator that drives remote locking/unlocking. A correctly functioning lock ensures door retention in all driving conditions and reliable operation of the central locking and alarm interfaces.
How To Replace
- Prepare: Park the vehicle on level ground and ensure the door is open and stable. For safety, consider isolating the negative battery terminal before disconnecting electrical connectors.
- Remove Interior Trim: Carefully detach the door card to access the lock mechanism—remove fasteners and clips, and lift the trim away without damaging wiring or vapour barrier.
- Disconnect Linkages And Wiring: Unclip the mechanical rods that connect the handle and latch, and unplug any electrical connector for the actuator or central locking.
- Unbolt Lock: Remove the retaining screws/bolts holding the lock to the door shell and extract the lock assembly from the door edge.
- Install New Unit: Fit the new lock, secure fasteners evenly, reconnect linkages and electrical connector, and verify correct rod routing and clip seating.
- Test Before Reassembly: Operate the lock with the key, interior handle and remote central locking to confirm smooth function. Check for correct latch engagement and release.
- Reassemble Door Trim: Replace the vapour barrier if removed, refit the door card and all fasteners. Final functional check of locking and handles is recommended.
Installation Recommendations
- Use Correct Fasteners: Reuse or replace door lock screws with original-spec fasteners to ensure secure mounting.
- Lubricate Moving Parts: Apply a light, long-life grease to latch contact points to reduce wear and prevent sticking.
- Check Linkage Alignment: Ensure rods and clips are seated correctly to avoid binding or incomplete locking.
- Electrical Checks: Verify connector contacts are clean and free of corrosion; a poor connection can cause intermittent actuator faults.
- Functional Test: Test locking/unlocking with ignition off and on, and confirm central locking integration if fitted.
Why The Part Most Commonly Fails
Door locks on Peugeot 407 typically fail due to mechanical wear of the latch components, corrosion from moisture ingress, or failure of the small electric actuator motor in centrally locked doors. Frequent use, exposure to road salt and water, blocked drainage inside the door, or bent/broken linkage rods accelerate wear. Symptoms include intermittent locking, noisy operation, inability to lock/unlock with the key or remote, and a door that does not stay latched properly.
Choosing the correct OEM-referenced unit (e.g., 9659739880 / 9135AY / 9135FN) ensures compatibility and reduces risk of premature issues. Suitable for garages and DIY repairs, this replacement helps restore secure operation and reliable central locking performance.
