Description
Electric lock for left rear door for Citroën C8 and Peugeot 807. Rear door behind the driver.
Product Overview
This electric door lock (door lock actuator) is a direct-fit replacement designed for the left rear door of Citroën C8 and Peugeot 807 models. Supplied under part code 913789, it restores secure central locking and reliable mechanical latching where the original unit has failed. Ideal for professional workshops and experienced DIY mechanics, the unit is built to match the original mounting points and connector layout for straightforward installation.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C8, Peugeot 807
- Product Codes: 913789
- Other Numbers: N/A
Function And Symptoms
The electric lock controls the mechanical latch and receives central locking impulses to lock or unlock the rear left door. Typical symptoms of a failing unit include inability to lock/unlock that door with remote or central locking, intermittent operation, grinding or clicking noises from inside the door, or the door not latching securely. A faulty lock can also cause the interior alarm or central locking system to report an open-door condition.
Installation Recommendations
- Always disconnect the vehicle battery before starting work to avoid short circuits and protect vehicle electronics.
- Remove the door trim panel carefully (remove screws, clips and any moisture barriers) to access the lock mechanism.
- Disconnect the electrical connector and unclip or detach the locking rods/linkages from the actuator; note rod positions for correct reassembly.
- Unbolt the lock unit from the door shell, fit the replacement in the same orientation and secure with the original fasteners.
- Reconnect linkages and the electrical connector, test locking/unlocking function several times before refitting the door trim, and verify proper mechanical latching.
- Use manufacturer torque values where specified and replace any damaged clips or fasteners to ensure a solid refit.
- If you encounter wiring damage, corroded connectors or additional electrical faults, inspect the harness and repair as needed before completing the installation.
Why This Part Fails Most Often
- Age and Mechanical Wear: Plastic gears and small mechanical components inside the actuator wear over time, leading to grinding, slipping or complete failure.
- Water Ingress and Corrosion: Moisture entering the door cavity can corrode connectors, motor contacts or linkages, especially on vehicles exposed to road salt or heavy rain.
- Broken Linkages or Impact Damage: Misaligned doors, slam impacts or accidents can bend or break rods and mounts, causing the lock to bind or fail.
- Electrical Problems: Corroded connectors, damaged wiring or poor ground connections produce intermittent operation or no power to the actuator.
- Lack Of Lubrication: Seized mechanical parts due to dirt or absent lubrication increase load on the actuator and accelerate wear.
Compatibility And Tips
This unit is commonly searched for by its product code 913789. Confirm visual match with the original actuator (mounting points and connector type) before installation. There is no universal replacement interval; lifetime depends on usage and environmental exposure. Replacing a failing actuator early prevents further damage to linkages and avoids door security risks.
Who Should Fit This Part
Suitable for professional technicians and experienced DIY mechanics familiar with door trim removal and basic electrical diagnostics. If you are unsure about diagnosing wiring faults or repairing corrosion, have the repair performed by a qualified workshop to ensure reliable operation.
