This 4WD ECU (transfer case control unit) is designed for Citroën C-Crosser and Peugeot 4007 models and manages the engagement and monitoring of the vehicle’s four-wheel drive system. Supplied under part numbers 8631A676 / 314404 / 1614073580, the unit is a direct-fit replacement for vehicles equipped with the original transfer case control electronics. Ideal for professional workshops and experienced DIY mechanics, this control unit restores correct torque distribution, improves traction control responses and eliminates faults related to transfer case actuation.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C-Crosser, Peugeot 4007
• Product Codes: 8631A676, 314404
• Other Numbers: 1614073580

Function And Benefits

The transfer case control unit monitors wheel speed sensors, transfer case position sensors and actuator feedback to control 4WD engagement. It communicates with other vehicle systems via the CAN network to coordinate traction control, ABS and transmission behavior. Replacing a faulty unit typically resolves warning lights related to the 4WD system, eliminates incorrect or delayed transfer case engagement and restores proper off‑road or low‑traction performance.

Replacement Procedure

Installation should be performed by a trained technician or an experienced DIY mechanic with appropriate tools. Typical steps:

• Disconnect the negative battery terminal before starting work and follow the vehicle manufacturer’s safety procedures.
• Locate the control unit (mounted on or near the transfer case or transmission area; exact location depends on model and engine bay layout).
• Carefully unplug electrical connectors and remove mounting fasteners.
• Fit the new unit, secure fasteners and reconnect all electrical plugs ensuring good contact and intact sealing.
• After installation, verify electrical connections and perform system checks. Depending on vehicle configuration, initialization or coding of the unit may be required to ensure full integration with the vehicle network and proper 4WD operation.

Installation Recommendations

• Always disconnect the battery before removing or installing the control unit.
• Protect connectors from dirt and moisture during installation; use dielectric grease on contacts if recommended by the manufacturer.
• Inspect wiring harnesses and connector seals for corrosion or damage and repair any compromised wiring before fitting the new unit.
• After fitting, clear fault codes and perform a road test to confirm correct engagement of the transfer case and absence of warning lights.

Most Common Failure Reasons

• Water Ingress And Corrosion: Exposure to moisture leads to connector corrosion and internal PCB damage.
• Connector Or Wiring Damage: Physical damage, broken pins or poor grounding causes intermittent faults.
• Thermal Stress And Ageing: Long-term heat cycles and vibration degrade electronic components.
• Actuator Or Sensor Faults: A failing transfer case actuator or related sensor can create electrical loads and fault codes that affect the ECU.
• Electrical Surges: Voltage spikes from jump-starting or alternator faults can damage onboard electronics.

Part numbers 8631A676, 314404 and 1614073580 are commonly searched identifiers — using these codes will help you quickly find the exact unit needed for the Citroën C-Crosser and Peugeot 4007 4WD systems.

Your search for quality spare parts for your Citroën and Peugeot vehicles has led you to the right place. Our Sliding Door Control Unit is the ideal solution for the Citroën C8 and Peugeot 807. This key component of the control system is essential for the proper functioning of your vehicle’s sliding rear doors, ensuring smooth opening and closing.

Our auto part is designed to meet original specifications, guaranteeing high reliability and long-lasting durability. Because it is a used part, it is highly valued for its economic advantage compared to new parts, while still offering excellent functionality and quality.

Technical Information

• Manufacturer: Citroën, Peugeot
• Model: Citroën C8, Peugeot 807
• Product Codes: 1400736580, 9138H5

The Sliding Door Control Unit is one of the components that may require replacement over time due to normal wear and tear or failure. Installation is straightforward and uncomplicated, allowing for quick and easy replacement, ideal for professional workshops as well as home mechanics. Ensure that all technical and safety standards are adhered to during installation.

Take advantage of our fast and secure purchasing process to acquire this control unit and ensure the smooth operation of your sliding rear doors with confidence in their correct functionality. Order now and benefit from our competitive prices and quality guarantee.

Are you looking for a reliable and proven ECU (Electronic Control Unit) for the sliding doors of your PEUGEOT 1007? This part, marked with product codes 1400047280 and 657047, is an ideal replacement for your original unit. The device has been carefully tested and is ready for installation, ensuring seamless operation and restoring the smooth control of your vehicle’s doors.

Technical Information:
Manufacturer: Original part for PSA Citroën and Peugeot brands
Model: Specific for PEUGEOT 1007, 807, C8
Product Codes: 1400047280, 657047
Additional Numbers: Listed catalog numbers for easy identification and ensuring compatibility.

The ECU unit for the sliding doors is a key component for the proper functionality of the front and rear sliding doors of the vehicle. It is a part that often requires replacement due to wear or damage to the original unit and its faults, which can result in incorrect or intermittent door function. This replacement control unit excels in quality and has been diligently tested to be as compatible as possible with your vehicle’s original system.

Shopping for used auto parts has many advantages, particularly in terms of price and environmental aspects. Every part we offer has undergone a series of tests and inspections to ensure high quality and functionality. Additionally, handling these parts is environmentally friendly, as it involves recycling already manufactured components, reducing the impact on nature and promoting sustainability.

Despite being a used part, customers can expect excellent functionality, as each component is carefully tested before sale. With our focus on quality and reliability, you can be assured that the purchased control unit will be a direct and effective replacement for your vehicle.

Are you searching for a reliable replacement control unit for the sliding doors of your PEUGEOT 1007? Our used ECU is the ideal choice for auto mechanics or DIY enthusiasts looking to save costs while ensuring proper vehicle functionality. This specific unit guarantees reliability and seamless operation in your vehicle.

With the use of original manufacturer part numbers (9659970380, 9659919080, 6554SR), you can be confident that this part will fit perfectly and communicate correctly with other systems in your car. In the automotive parts world, ensuring compatibility with your car model is crucial, and we provide you with that assurance.

Technical Information
Manufacturer: PSA Citroën Peugeot
Model: PEUGEOT 1007
Product Codes: 9659970380, 9659919080, 6554SR
Other Numbers: Sliding Door ECU

Frequent replacement of this part can be caused by excessive load on the sliding door mechanism, which is common in models where these doors serve as a frequently used entry point. The function of this part is essential for the smooth and safe opening and closing of sliding doors, ensuring comfort and safety for passengers.

We focus on making our products not only functional but also available at fair prices. This product is the ideal solution for your vehicle if you are looking for a quality and verified replacement for the original part.

Remember that proper installation and maintenance are key to the longevity of auto parts. This control unit is ready for installation, but we recommend professional installation to ensure its correct functioning in your vehicle.

Feel free to contact us with any questions regarding installation or the compatibility of this part with your vehicle. We look forward to your order and wish you many safe kilometers with our auto parts!

Failure or damage to this control unit can cause problems such as doors failing to open or close properly, posing inconvenience and potential safety risks for both drivers and passengers. Replacing the ECU helps restore optimal door function, ensuring smooth and reliable performance.

Technical Information:

• Manufacturer: PSA
• Model: Citroën C8, Peugeot 807
• Product Codes: 1400043980, 657046
• Additional Numbers: Information Not Available

Installation of this ECU is relatively straightforward and can be performed efficiently with proper knowledge or by a qualified automotive technician. Correct installation is vital, especially when using used parts, to ensure maximum performance, safety, and longevity.

As the ECU controls critical electronic functions related to door movement, it is designed to withstand the operational stresses of daily use. However, like any electronic module, excessive wear, electrical faults, or collision damage can lead to malfunction over time.

Opting for this tested and reliable ECU is a cost-effective solution compared to purchasing new parts, particularly for maintaining older Citroën or Peugeot models. It guarantees the function necessary to keep your vehicle’s sliding doors operating smoothly, enhancing both comfort and safety during your drives.

Product Overview

This control unit is designed to manage the operation of the sliding rear doors on Citroën C8 and Peugeot 807 models. It controls the door motor, position sensors and safety interlocks to ensure smooth opening and closing, soft-stop behaviour and integration with central locking and vehicle security systems. The part is often searched by its product numbers, so check compatibility by referencing the listed codes.

Key Benefits

• Direct replacement for original sliding-door controllers used on compatible Citroën and Peugeot vehicles.
• Restores automatic sliding-door functions: motor control, end-stop detection and safety reversal.
• Saves workshop time when the module is cloned or correctly initialized and coded.

Compatibility and Typical Applications

Intended for use on:

• Citroën C8
• Peugeot 807

Customers and technicians commonly search using product codes 1400745380 and 9138H5.

How It Is Replaced

• Disconnect the battery before any work on the vehicle electrical system.
• Remove the interior trim of the sliding door or the access cover where the module is located; the unit is typically mounted inside the sliding door cavity or adjacent bodyshell area and fixed with screws or clips.
• Unplug the main connector(s) and remove the unit from its bracket.
• Fit the replacement unit, reconnect the wiring and reassemble trim panels.
• Complete cloning or coding/initialization as required (see Installation and Coding – Important).

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C8; Peugeot 807
• Product Codes: 1400745380, 9138H5
• Other Numbers: No additional numbers available

Installation and Coding – Important

• The unit is used and is “paired” with the original vehicle (VIN/PIN/keys).
• Commissioning options:
1. Cloning data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
2. Virginization and subsequent initialization/telecoding via DiagBox (or online) + key adaptation.
• Recommended to be carried out by a professional with PSA service equipment (DiagBox/Lexia/PP2000).
• Always disconnect the battery before disassembly/assembly and follow the manufacturer’s procedure to avoid damaging the unit.

Recommendations For Installation

• Perform cloning or coding first on a bench only if you have the correct tools and experience; otherwise complete installation and have coding performed with the vehicle connected.
• Inspect door wiring harness, connectors and limit switches while replacing the module — repaired wiring prevents repeated failures.
• Use dielectric grease on accessible connector pins after reassembly to reduce future corrosion risk.

Why This Part Fails Most Often

• Water ingress and corrosion around connectors or inside the door cavity leading to short circuits or intermittent connections.
• Mechanical stress to the wiring harness or damage from door impacts and worn seals.
• Motor stalls or end-stop switch failures that place extra load on the controller, causing overheating or relay/component failure.
• Electrical surges or poor grounding that damage internal electronics.

Symptoms Of A Faulty Unit

• Sliding door does not open or close automatically or operates intermittently.
• Door reverses unexpectedly or fails to detect end positions.
• Error messages or warning lights related to door functions on the instrument cluster.

This description is provided to help professional technicians and experienced DIYers identify and replace the correct module. Always follow safe working practices and manufacturer repair procedures when working on vehicle electrical systems.

This sliding rear door control unit (ECU) is a direct-fit electrical module designed for Citroën C8 and Peugeot 807 vehicles equipped with powered sliding rear doors. Built to manage motor control, door position sensors and safety interlocks, it restores reliable automatic opening/closing and integrates with central locking and anti-pinch systems. Ideal for professional workshops and experienced DIY mechanics who search by product number (e.g. 1400500180, 9138H4).

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C8; Peugeot 807
• Product Codes: 1400500180, 9138H4
• Additional Numbers: 1488780080, NFP

Fitment And Compatibility

Compatible with Citroën C8 and Peugeot 807 models equipped with electrically operated sliding rear doors. Always confirm fitment against the product codes listed above and the physical connector arrangement on the vehicle. This unit is typically mounted in the sliding door assembly or adjacent B-pillar area depending on body trim.

Function And Purpose

The control unit regulates the sliding door motor, reads limit and position switches, interprets anti-pinch and safety sensors, and communicates with the vehicle’s central locking systems. It ensures smooth, timed opening/closing sequences and interrupts movement when an obstruction is detected to prevent injury or damage.

Replacement Procedure

1. Disconnect the vehicle battery before any work to avoid electrical damage and unintended activation.
2. Remove interior door trim panels and any protective covers to access the module and wiring connectors.
3. Label and disconnect the electrical connectors and detach any linked cabling or actuator linkages.
4. Unbolt the control unit, replace with the new unit and secure it in the original mounting position.
5. Reconnect all plugs, reassemble trim and reconnect the battery. Perform functional tests: door open/close cycles, anti-pinch operation and central locking response.

Installation Recommendations

Use correct trim tools to avoid damage to panels and clips. Check connector pins and wiring for corrosion or damage before installing the replacement unit. After installation verify mechanical door travel, limit switch calibration and sensor operation. If diagnostic equipment is available, read fault codes and clear them after successful replacement.

Why The Part Commonly Fails

Common failure causes include water ingress and corrosion of connectors, wear from repeated use, short circuits caused by damaged wiring, and failures of onboard relays or electronic components due to voltage spikes. Mechanical impacts or door alignment issues can also overload the module by causing repeated stall conditions.

Recommended Diagnostics

Begin troubleshooting by checking fuses, wiring continuity and connector condition. Use a diagnostic scanner to read error codes related to door motors, sensors and body control functions. Inspect door rails, rollers and latches for binding that can place extra load on the motor and control unit.

For Who

Designed for professional mechanics and competent DIY enthusiasts who are familiar with electrical diagnostics and door mechanism servicing. The product codes included in this listing make it easy to locate the correct replacement part.

Product Description

This genuine used control unit manages the electrical operation of the sliding rear doors on Citroën C8 and Peugeot 807 models. It Controls Motors, Door Position Sensors, Safety Inhibitors And Interlocks, Ensuring Smooth Opening/Closing, Obstacle Detection And Synchronisation With Central Locking And Interior Switches. Ideal For Professional Workshops And Do-It-Yourself Mechanics Looking To Restore Reliable Sliding-Door Functionality.

Key Benefits

• Direct Fit For Listed Models: Uses Original Manufacturer Part Numbers For Easy Identification.
• Restores Full Door Functionality: Ensures Motor Control, End-Of-Travel Limits And Safety Cut-Outs Work Correctly.
• Time-Saving Replacement: Plug-In Electrical Connections Reduce Workshop Labour Time When Installed Correctly.
• Suitable For Mechanic And Enthusiast Use: Clear Installation And Coding Paths For Professional Recommissioning.

How It Works And Typical Faults

The unit Regulates Power To The Sliding-Door Motor, Reads Limit Switches And Sensors, And Communicates Lock/Unlock Status To The Vehicle Network. The Most Common Causes Of Failure Are Water Ingress And Corrosion Of Connectors, Impact Or Mechanical Damage To The Door Mechanism, Short Circuits In Wiring Or Intermittent Faults In Internal Electronics Caused By Age Or Vibration. Fault Symptoms Include Unresponsive Door Motor, Intermittent Opening/Closing, Safety Cut-Outs Triggering Incorrectly, Or Complete Loss Of Door Control.

Replacement And Service Notes

General Replacement Steps (Summary):

• Disconnect The Battery Before Starting Work To Avoid Short Circuits And Protect The Unit.
• Remove The Interior Trim Panels To Access The Sliding-Door Control Unit; Keep Fasteners Organised.
• Unplug All Electrical Connectors Carefully And Note Any Retaining Clips Or Seals To Ensure Water Tightness On Reassembly.
• Swap The Unit, Reconnect Harnesses, Refit Trim Panels And Reconnect The Battery.
• Perform Coding Or Data Transfer As Required (See Installation And Coding – Important).

Installation And Coding – Important

– The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
– Options For Commissioning:
1) Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
2) Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
– Recommended To Be Performed By A Technician With PSA Service Equipment (DiagBox/Lexia/PP2000).
– Always Disconnect The Battery Before Removal/Installation And Follow The Manufacturer’S Procedure To Avoid Damaging The Unit.

Recommended Workshop Advice

Check The Door Mechanism And Wiring Harness For Signs Of Water Ingress, Corrosion Or Mechanical Binding Before Replacing The Module. Replace Any Damaged Seals, Clean Connector Pins And Apply Dielectric Grease To Prevent Future Corrosion. If The Fault Is Intermittent, Consider Cloning The Original Module Data To The Replacement Unit To Preserve Learned Limits And Behaviour.

Why This Part Fails Most Often

Failures Commonly Result From Water And Moisture Penetration Into Connectors Or The Module Housing, Corrosion Of Electrical Contacts, Damage From Impact Or Excessive Strain On Door Linkages, And Age-Related Electronic Component Degradation. Faults Are Also Frequently Triggered By Wiring Harness Damage At Door Hinges Or Sliding Rails Where Movement Causes Wear.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C8; Peugeot 807
• Product Codes: 1488780080; 1400500180; 9138H4
• Additional Numbers: NFP

Compatibility And Notes

Part Numbers And Vehicle Fitment Shown For Quick Reference. Ensure That The Replacement Unit Matches The Required Part Numbers Listed Above. For Proper Commissioning After Fitment, Use The Recommended Diagnostic Procedures To Clone Or Initialize The Module So All Door Functions And Key Adaptations Work Correctly.