Description
Control unit for parking assistance for CITROËN and PEUGEOT vehicles.
This parking assist ECU is designed for Citroën and Peugeot models and is commonly searched by its product codes (for example 9629825180). It processes signals from ultrasonic parking sensors, manages audible and visual proximity warnings and communicates with vehicle dashboards and buzzer systems. Ideal for professional workshops and experienced DIYers, this unit restores proper parking sensor functionality on affected vehicles and is a direct-fit replacement for compatible Stellantis systems.
Typical Applications
Fits, for example: Citroën C5, Citroën C8, Peugeot 807. Often referenced by product codes such as 9629825180, 659078 or 601746 — include these numbers when searching to improve compatibility matching.
Function And Symptoms
The unit interprets inputs from the vehicle’s ultrasonic sensors and controls distance warnings (beeps, display indicators). When the ECU fails, common symptoms include no beeps from the parking aid, constant or false warnings, intermittent operation of the sensors, or error messages on the instrument cluster related to the parking system. Faults in this module can make reversing maneuvers less safe and remove driver assistance features.
Replacement And Installation
General replacement steps (workmanship level: mechanic or experienced DIY):
- Disconnect the negative battery terminal before any work.
- Gain access to the unit (often located behind the rear bumper, behind trim panels or in the luggage compartment depending on model).
- Document connector positions and remove any retaining clips or screws securing the ECU.
- Carefully unplug wiring harnesses, inspect connectors and wiring for corrosion or damage and replace/repair as needed.
- Install the replacement unit, secure all fasteners to manufacturer torque where available and reconnect connectors.
- Reconnect the battery and perform system checks; verify sensor readings and parking aid operation.
Note: Some vehicles may require initialization or coding of the parking ECU to match vehicle configuration and sensor count. This is typically performed with PSA diagnostic tools (DiagBox/Lexia) or equivalent equipment.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model(s): Citroën C5, Citroën C8, Peugeot 807
- Product Codes: 9629825180, 659078, 601746
- Additional Numbers: 601.746, NFP
Installation Recommendations
- Always disconnect the battery before removal and installation to avoid electrical damage.
- Work on a dry vehicle and avoid exposing connectors to road salt or moisture during installation.
- Inspect and clean all connector pins; replace any damaged seals to maintain water resistance.
- After fitting, run a full diagnostic sequence and perform sensor tests to confirm correct operation.
- If coding is required, use appropriate PSA diagnostic software or consult a professional with the correct equipment.
Why This Part Commonly Fails
- Water Ingress And Corrosion: Moisture penetrating connectors or housing leads to intermittent faults or total failure.
- Physical Damage: Rear impacts or bumper damage can transfer force to the ECU or sensors.
- Electrical Surges And Poor Grounding: Voltage spikes or bad grounding damage internal electronics.
- Age And Environmental Exposure: Long-term exposure to salt, dirt and temperature cycles degrades components.
- Wiring And Connector Issues: Broken wires, loose pins or poor repairs cause communication errors between sensors and the ECU.
Search Tip
When searching or ordering, include the main product code (9629825180) and additional numbers (659078, 601746) to improve the chance of finding the correct unit for your vehicle.
