Description
Electric lock for left front door for Peugeot 407
Driver’s door
Product Overview
This electric left front door lock (door lock actuator) is a direct-fit replacement for the Peugeot 407 driver’s door. Designed for professional workshops and DIY mechanics, the unit restores reliable central locking, secure door latching and proper operation of interior/exterior handle mechanisms. Customers often search using the part numbers 9686683680, 9135AY or 9135FN — include these references when looking up compatibility.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Peugeot 407
- Product Codes: 9686683680, 9135AY, 9135FN
- Other Numbers: Alternative references commonly used by workshops and parts catalogs include the codes listed above
Function And Common Symptoms
The door lock actuator is an electromechanical unit that operates the latch and microswitches for the driver’s door. It receives central locking signals (remote or switch) and physically moves the latch to lock or unlock the door. Typical failure symptoms include: intermittent or no locking/unlocking on the driver’s door, inability to open the door from the inside or outside, unusual grinding or buzzing noise from inside the door, and faults recorded in vehicle central locking diagnostics.
Installation Recommendations
Follow these practical steps to replace the unit safely and ensure correct function:
- Safety First: Disconnect the negative battery terminal before starting work to avoid short circuits and protect door electronics and airbag circuits.
- Remove Trim: Carefully remove the inner door card using trim tools to avoid damage to clips and upholstery. Detach any vapor barrier carefully if present.
- Disconnect Electrical Connector: Unplug the actuator electrical connector and any linked cables for handles or microswitches.
- Remove Fixings: Unscrew the bolts or rivets securing the lock actuator and detach the linkage rods from the latch mechanism. Note the orientation and order of any clips for reassembly.
- Fit New Unit: Install the replacement lock in the same position, reconnect linkage rods and fix bolts to the correct torque. Reconnect the electrical connector.
- Test Before Reassembly: Reconnect the battery temporarily and test central locking, remote function, handle operation and door switch signals. Verify smooth mechanical operation and listen for abnormal noises.
- Final Steps: Disconnect battery again if required, reattach the vapor barrier, refit the door card and restore the battery connection. Perform a final functional test.
Recommended Tools
Screwdrivers, trim removal tools, Torx/socket set, pliers for linkage clips and a multimeter for quick electrical checks.
Why This Part Most Often Fails
Door locks fail due to a combination of mechanical wear and environmental factors: water ingress and corrosion inside the door, worn actuator motor or gears, broken plastic linkage clips, and degraded microswitches. Frequent use over many years and exposure to moisture and dirt accelerates wear. Electrical issues such as corroded connectors or damaged wiring can also prevent the actuator from receiving signals.
Practical Tips For Long Service Life
- Keep door seals in good condition to reduce moisture ingress.
- Inspect and lubricate latch points with suitable lubricants during door servicing.
- Check door wiring harness and connector condition when replacing the actuator to avoid future electrical faults.
Compatibility And Notes
This lock is intended for the driver’s (left front) door of the Peugeot 407. Use the listed product codes when searching parts catalogs to match the correct unit. After replacement, verify central locking operation from both the switch and remote and confirm mechanical lock/unlock from the interior and exterior handles.
