Description
Electric control for right rear sliding door Citroën C8 and Peugeot 807
This electric right rear sliding door control unit is a direct-fit replacement part designed for Citroën C8 and Peugeot 807 models. Ideal for professional workshops and DIY mechanics, the unit restores reliable opening, closing and locking functions of the sliding door. Built to integrate with the vehicle’s existing electrical system and door mechanisms, it addresses common symptoms such as failure to latch, intermittent door movement, or complete loss of motor operation. Keywords: Citroën C8 sliding door motor, Peugeot 807 sliding door control, 9138Q4 door actuator, right rear sliding door replacement.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C8, Peugeot 807
- Product Codes: 9138Q4
- Additional Numbers: Not Available
Fitment And Function
Designed specifically for the right rear sliding door, this electric control unit operates the door motor and associated latch mechanisms to enable powered sliding and secure locking. It works with the vehicle’s door wiring harness, switches and central locking system to provide synchronized operation. Suitable for mechanics servicing sliding door drive systems or owners performing a direct component replacement.
Replacement Procedure (Overview)
- Disconnect the negative battery terminal before starting to prevent short circuits and accidental motor activation.
- Remove interior trim panels to access the sliding door motor/actuator and electrical connectors. Keep fasteners and clips organized for reassembly.
- Unplug the electrical connector(s) and detach any linkage or cables between the actuator and the latch/drive mechanism.
- Unbolt the actuator/motor assembly from the door and remove the unit. Compare the old part with the new one to confirm identical mounting points and connector types.
- Install the new unit, reconnect linkages and electrical connectors, and reassemble trim panels. Reconnect the battery and cycle the door through full open and close operations to confirm correct function and alignment.
Installation Recommendations
- Perform installation on a level surface and use appropriate trim tools to avoid damaging interior panels.
- Inspect wiring harnesses and connectors for corrosion or damaged insulation; repair or replace any compromised wiring to prevent future faults.
- Lubricate sliding tracks and mechanical linkages with a suitable silicone or white lithium grease to reduce wear and motor load.
- After fitting, calibrate the sliding door by cycling it several times and checking that the latch engages smoothly and that door seals are properly seated.
Most Common Cause Of Failure
Failures of sliding door electric controls are typically caused by a combination of mechanical wear and environmental factors. Common issues include:
- Wear Of Motor Brushes Or Geartrain: Repeated use over years leads to internal wear, reducing torque or causing the motor to stop.
- Water Ingress And Corrosion: Moisture entering the actuator or connectors can cause electrical faults and corrosion of contacts.
- Damaged Or Frayed Wiring: Pinched or chafed wiring in the door hinge area leads to intermittent or permanent loss of power.
- Track Obstruction Or Misalignment: Debris or misaligned tracks increase motor load and accelerate failure.
- Faulty Door Latch Or Linkage: Mechanical binding at the latch can overload the actuator and trigger failure.
Typical signs to diagnose a failing unit are slow or labored door movement, grinding or unusual noises from the motor area, blown fuses related to the door circuit, or complete non-response when the door switch is used. When replacing the control, always inspect related mechanical components and electrical connections to ensure a long-lasting repair.
