Description
Control unit for sliding rear doors for Citroën C8 and Peugeot 807. Tested.
Overview
Replacement sliding door ECU designed for Citroën C8 and Peugeot 807 models. This control unit manages automatic/opening and closing of the sliding rear door, safety monitoring, and the communication with the vehicle body electronics. Supplied with common manufacturer product codes for easy lookup by mechanics and DIY enthusiasts.
Function
The module controls the sliding-door motor, end-of-travel detection, safety edge/obstacle detection, and processes inputs from interior/exterior switches and remote commands. It also monitors door position and interlocks with vehicle systems (for example locking when driving). The unit communicates with other body computers via the vehicle CAN bus where applicable.
Fitment And Compatibility
Primarily intended for Citroën C8 and Peugeot 807. Frequently searched by original part numbers – check the listed product codes below to confirm match with the replacement part you need. Compatibility can depend on production year, door configuration and factory options.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C8; Peugeot 807
- Product Codes: 1488780080; 1400500180; 9138H4
- Additional Numbers: NFP
Common Faults And Causes
- Water ingress or corrosion at connectors causing intermittent or permanent failure.
- Electrical overloads from a failing door motor or jammed mechanism leading to blown internal components.
- Damaged wiring or poor earth connections producing erratic behaviour.
- Mechanical wear in door tracks or rollers causing increased load and subsequent ECU protection trips.
- Age-related component failure or degraded solder joints in the module.
Installation Recommendations
- Prepare basic tools: trim removal tools, torx/screwdrivers and a multimeter.
- Before starting, isolate the vehicle electrical system by disconnecting the negative battery terminal to avoid short circuits while working on wiring and connectors.
- Remove interior trim panels carefully to access the sliding door ECU (location varies by vehicle: often inside the sliding door or rear quarter panel).
- Inspect connectors and wiring for corrosion or damage; clean and repair any issues before fitting the new unit.
- Plug in the replacement unit and perform a full functional check of door travel, obstacle detection and lock/unlock behaviour.
- Some vehicles may require initialization or adaptation of the module using a PSA diagnostic tool (DiagBox/Lexia) after replacement—plan for diagnostic access if required.
Why Replace This Part
Replacing the sliding door ECU restores reliable automatic door function, safety edge responsiveness and correct communication with central locking/vehicle electronics. Timely replacement prevents secondary damage to the motor and mechanical door components caused by repeated ECU protection trips or intermittent control signals.
Notes For Mechanics And DIYers
When sourcing this part, use the product codes above for accurate identification. Always verify the physical connector and mounting position before final installation. After fitting, check door safety features and full travel in both manual and powered modes.
