Description
Overview
This Parking Assist ECU is the control unit responsible for managing ultrasonic parking sensors and parking aid functions on select Citroën and Peugeot vehicles. Supplied under the identification numbers 9629825380 and 659078 (additional reference 601746), the module interprets sensor signals and controls the vehicle's parking alerts and related outputs.
Key Functions and Symptoms
- Controls front and/or rear parking sensors, providing audible and visual warnings to the driver.
- Common symptoms of a faulty unit: sensors not responding, constant or intermittent beeps, dashboard parking aid warnings, or loss of parking assist features.
Replacement and Installation
Access to the unit varies by vehicle but it is commonly located in the rear bumper area, luggage compartment lining or an electrical box. Always disconnect the vehicle battery before disconnecting connectors. Replace the module with the correct part number and ensure secure connector seating. After physical replacement, the ECU usually requires programming/coding and sensor calibration using PSA-compatible diagnostic tools (for example DiagBox/Lexia or equivalent). Follow the vehicle service manual for procedure, connector locations and safety precautions.
Common Failure Causes and Service Life
Failures are often caused by water ingress, connector corrosion, impact damage or electrical surges. Environmental exposure to moisture, road salt and mechanical damage increases the likelihood of failure. Service life varies with use and conditions; inspect wiring and connectors when replacing the unit to prevent repeated faults.
Technical Information
- Manufacturer: PSA / Peugeot Citroën
- Model: Select Citroën and Peugeot Models (verify compatibility by part number)
- Product Codes: 9629825380, 659078
- Other Numbers: 601746, NFP
Notes for Mechanics and DIYers
This part is aimed at professional technicians and competent DIYers. Verify compatibility using the part numbers before purchase. Correct installation includes secure mechanical mounting, intact connector pins and final diagnostic coding and calibration to restore full parking aid functionality. If you lack a PSA diagnostic tool, seek professional programming to avoid unresolved fault codes or impaired system behaviour.
