Description
Electric lock for the left front door for Citroën C8 and Peugeot 807. Used part with a guarantee of functionality. Driver’s door.
This electric left front door lock (part number 9135L4) is designed for Citroën C8 and Peugeot 807 models. It replaces the original locking mechanism on the driver’s door and integrates with the vehicle’s central locking and remote locking systems. Built to meet OEM fitment, this used unit offers reliable operation and is a practical choice for professional garages and competent DIY mechanics seeking a direct swap for a faulty door lock.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C8, Peugeot 807
- Product Codes: 9135L4
- Other Numbers: None Available
Function and Application
The unit is an electric door lock/actuator for the left front (driver) door. It secures and releases the door latch when operated by the central locking system, door handle or remote control. The lock contains mechanical latch components plus an electric actuator and micro-switches that inform the body computer of lock/unlock status.
Replacement And Installation
Typical replacement steps for experienced technicians or skilled DIYers:
- Disconnect the negative battery terminal before starting work to avoid electrical shorts and to prevent unintended airbag or body control unit events.
- Remove the door trim panel and any moisture barriers to access the lock assembly and linkage rods.
- Disconnect the wiring connector and unclip/remove the locking rods and central locking linkage.
- Unbolt and remove the old lock mechanism from the door shell; fit the replacement unit and secure fasteners to the correct torque.
- Reconnect linkages and electrical connector, then test locking/unlocking function (mechanical and electrical) with the door open before refitting trim.
- Refit the door panel and verify smooth operation of handles, lock, and central locking from all control points.
Installation Recommendations
- Test the new lock electrically and mechanically before reassembling the door trim to save time in case of issues.
- Check and lubricate moving parts and linkage pivots with appropriate lubricant; avoid over-greasing electrical contacts.
- Inspect and replace any damaged clips, gaskets or moisture barriers to reduce future water ingress.
- Ensure correct routing and secure fastening of rods to prevent binding or disengagement.
- Use the OEM part number (9135L4) to confirm correct fitment for the 807/C8 driver door lock.
Why The Part Most Commonly Fails
Failures are usually caused by mechanical wear, ingress of moisture leading to corrosion, or breakage of plastic gears and linkage components inside the lock. Electrical failures can occur from worn actuators or intermittent contacts in the connector. Vehicles exposed to road salt and repeated wet/dry cycles are particularly prone to accelerated wear.
Notes For Professionals
Intended For: Automechanics And Skilled DIYers Looking For A Direct Replacement Door Lock For Citroën C8 Or Peugeot 807. When installing, verify smooth mechanical operation and correct electrical signaling to the vehicle’s central locking system before completing reassembly.
