Description
Electric central locking mechanism for the left rear door (rear door on the driver’s side) for Peugeot 407.
This electric door lock / central locking actuator is a direct-fit replacement designed for the left rear door of Peugeot 407 models. Ideal for professional workshops and experienced DIY mechanics, the unit restores secure locking, reliable remote central locking operation and smooth door latching. Many customers search by part number (e.g. 9659854180), so the actuator is listed with the most common OEM references for quick identification. The robust design integrates with the factory latch assembly and should be matched to the left rear (driver’s side rear) door location when ordering.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Peugeot 407
- Product Codes: 9659854180
- Other Numbers: 9137K8, 9137Q7
- Position: Left Rear Door (Driver’s Side Rear Door)
- Function: Electric central locking actuator / door lock mechanism
Replacement Guide
Basic replacement steps for a competent mechanic or skilled DIYer:
- Safely disconnect the negative battery terminal before starting to avoid short circuits and protect vehicle electronics.
- Remove the inner door trim and any moisture barriers to access the latch and actuator assembly.
- Disconnect the electrical connector and any linkage rods or clips attached to the lock.
- Remove the mounting screws/bolts holding the lock actuator and detach the unit from the latch assembly.
- Install the new actuator in the same orientation, secure fasteners, reconnect linkage and electrical connector.
- Reconnect the battery and test the central locking and manual operation before refitting the door trim. Verify smooth latching and unlock/lock cycles from the key, remote and interior switch.
Installation Recommendations
- Work on a dry, well-lit bench or with the door open and supported to avoid pinched wiring and to keep the moisture barrier intact.
- Use appropriate trim tools to avoid damaging clips; retain all fasteners and replace any brittle clips.
- Check and clean electrical connectors; apply dielectric grease to contacts if needed to prevent corrosion.
- Lubricate latch moving parts with suitable long-life grease to reduce friction and prolong life of the mechanism.
- Always test the complete lock function (remote, key, interior switch and manual latch) before final assembly of the door panel.
Why It Fails Most Often
Common causes of actuator or door lock failure include water ingress and corrosion of internal components, deterioration or breakage of plastic gears and mechanical linkages, electrical connector corrosion or wiring fatigue, and wear from extensive use over many years. Faulty drainage or damage to the door seal can accelerate water-related failures. Mechanical impact from closing the door with obstructions or after an accident can also damage the unit.
Because this part is an active electromechanical component, failures are more frequent in older vehicles or cars exposed to heavy use and harsh environments. Replacing the actuator and correcting any underlying causes (moisture, damaged seals, worn linkages) will improve long-term reliability.
Benefits
- Restores reliable central locking and door security
- Direct fit for left rear door of Peugeot 407 when matching listed part numbers
- Suitable for professional installation and competent DIY replacement
