Description
Electric lock for the left front door for PEUGEOT 407 — Driver’s Door.
High-quality electric door lock for the left front (driver’s) door of the Peugeot 407. This replacement unit restores reliable central locking and door latching function, compatible with original part numbers 9683417880, 9135AY and 9135FN. Ideal for professional workshops and DIY mechanics who need a direct-fit solution to repair faulty door locking, actuator motor issues or damaged latch mechanisms. Including the correct part number in your search (9683417880 / 9135AY / 9135FN) improves findability and ensures you get the matching unit quickly.
Technical Information
- Manufacturer: Peugeot (Stellantis)
- Model: Peugeot 407 — Left Front Door (Driver’s Door)
- Product Codes: 9683417880
- Other Numbers: 9135AY, 9135FN
Function And Application
The unit combines the mechanical latch and electric actuator that operate the central locking for the driver’s door. When the remote or central locking command is given, the actuator moves the latch mechanism to lock or unlock the door. It also secures the door in the closed position to prevent accidental opening while driving. This part is intended as a direct replacement for the original Peugeot 407 left front door lock assembly.
How To Replace
Basic replacement steps for an experienced mechanic or competent DIYer:
- Disconnect the negative battery terminal to avoid short circuits when working with door electrics.
- Remove the door trim panel and any moisture barriers to expose the lock assembly.
- Disconnect electrical connector(s) and unhook lock rods/cables from the latch and interior handle.
- Unscrew the lock unit from the door shell and withdraw the old assembly.
- Install the new lock in reverse order: secure mounting bolts, reconnect rods and connectors, and ensure all linkages move freely without binding.
- Reconnect the battery and test central locking, remote lock/unlock, interior handle and child lock function before refitting the door trim.
Installation Recommendations
- Work on a cool, dry day or in a workshop to minimize moisture ingress during assembly.
- Use dielectrical grease on electrical connectors to reduce corrosion risk and ensure reliable contact.
- Apply light lubricant to mechanical linkages and the latch pivot points to prevent binding.
- Check and, if necessary, replace broken plastic clips or worn foam moisture barriers to prevent future water damage.
- After installation, cycle the lock several times and check door alignment to avoid premature wear.
Why The Part Commonly Fails
Door lock assemblies on Peugeot 407 commonly fail due to a combination of mechanical wear and environmental factors. Typical causes include:
- Wear Of Gears Or Actuator Motor — Repeated use eventually wears internal plastic gears or the small electric motor, causing sluggish or non-functional locking.
- Moisture Ingress And Corrosion — Water entering the door can corrode electrical contacts or seize mechanical parts, especially if moisture barriers are damaged.
- Broken Plastic Components — Internal plastic levers and guides can fracture with age or impact, leading to loss of function.
- Damaged Linkages Or Rods — Bent or detached rods prevent the actuator from moving the latch correctly.
- Connector Corrosion Or Wiring Faults — Poor contact or broken wires between the lock and central locking module can mimic a failed lock.
Failure Timing: The assembly may last many years, but problems commonly appear after prolonged use or exposure to moisture — often after several years or around the higher mileage ranges, depending on driving conditions and maintenance.
Notes For Buyers
When searching and ordering, include the OEM numbers 9683417880, 9135AY or 9135FN to ensure you receive the correct left front door lock for the Peugeot 407. Suitable for professional repair shops and competent DIY mechanics who require a direct-fit replacement to restore central locking and secure door latching.
