Description
Electric central locking lock for the left front driver’s door
For Citroën Berlingo, Xantia and Peugeot Partner I and II, Peugeot 406
Oval connector, see second photo
This replacement electric door lock actuator is designed for the left front (driver’s) door on a range of Citroën and Peugeot models. The unit operates the central locking mechanism electrically, engaging and releasing the door latch when you lock or unlock the car with the remote, key or interior switch. The actuator fitted with the oval electrical connector (see second photo) matches the original wiring plug used on the listed models and the factory part number 9135H8 commonly referenced by mechanics and DIYers.
Application And Benefits
Fits popular models where reliable central locking is critical in daily use: Citroën Berlingo, Xantia and Peugeot Partner I & II and 406. Ideal for professional garages and independent mechanics as well as owners performing DIY repairs. Replacing a worn actuator restores quiet, consistent locking operation, prevents intermittent failures, and avoids door latch jams that can lead to further damage.
How It Works And Common Symptoms Of Failure
The actuator contains a small electric motor and gear train that move the lock rod or latch. Typical symptoms indicating a faulty actuator include: no response from the left front door during central locking, intermittent locking/unlocking, unusual grinding or clicking noises inside the door, or the door remaining locked or unlocked despite commands.
Why Actuators Fail
- Water ingress and corrosion inside the door leading to electrical failures or seized gears.
- Wear of internal plastic gears or mechanical linkages after many cycles.
- Connector corrosion or broken wiring at the oval plug causing intermittent power loss.
- Motor burnout due to age or overloading from a stiff latch mechanism.
Replacement Procedure (Summary)
Basic steps to replace the left front door actuator:
- Disconnect the negative battery terminal to avoid short circuits when working on the electrical system.
- Remove the interior door trim panel and any vapor barrier carefully to access the mechanism.
- Locate and unplug the oval electrical connector (match orientation) and detach any linkage rods connected to the actuator—note rod positions for reassembly.
- Unscrew the actuator mounting bolts or clips and remove the old unit from the door shell.
- Install the new actuator, secure mounting bolts, reconnect linkage rods, plug in the oval connector and test locking/unlocking before reassembling the door trim.
- Reinstall the vapor barrier and interior trim, then reconnect the battery and perform final checks.
Estimated time: An experienced mechanic can typically complete the replacement in 30–60 minutes per door; DIYers should allow additional time and appropriate tools.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën Berlingo, Xantia; Peugeot Partner I & II, 406
- Product Codes: 9135H8
- Additional Numbers: N/A
Installation Recommendations
- Handle the oval connector carefully—do not force pins; ensure a clean, dry connection.
- Check and, if necessary, lubricate the door latch and mechanical linkages before fitting the new actuator to reduce load on the motor.
- Inspect wiring for corrosion or damage and repair any exposed cables to prevent premature failure.
- After installation, cycle the central locking several times and check for smooth operation and correct door alignment.
Most Common Reason The Part Fails
The most frequent cause of failure is moisture ingress and subsequent corrosion inside the door, which damages the motor, gears or connector. Mechanical wear of internal gears and strain from a sticky or misaligned latch are also common causes. Regular inspection and addressing water leaks around seals and door frames will help prolong the life of the actuator.
