Description
Product Overview
This Parking Assist ECU is a control unit designed for PSA Group vehicles (Citroën and Peugeot). It manages the vehicle’s parking aid system by processing inputs from ultrasonic sensors and commanding audible and visual driver alerts. The unit is identified by OEM part numbers 9629825480 and 659078 (also referenced as 601746 in some listings). Verify compatibility with your vehicle by checking the part number against the VIN or existing ECU label.
Key Functions
- Processes signals from ultrasonic parking sensors to detect obstacles behind or around the vehicle.
- Controls acoustic warnings (beeps) and, where fitted, dashboard/infotainment visual indicators.
- Interfaces with other vehicle systems to inhibit or modify assistance if necessary (e.g., traction or transmission inputs).
Common Symptoms Of A Faulty Unit
- Parking sensors stop responding or constantly report an obstruction.
- Persistent warning lights or error messages related to the parking aid system.
- Intermittent operation or false beeping while no obstacle is present.
- Complete loss of parking assistance after impact or water exposure.
Why Units Fail
Failures commonly result from moisture ingress and corrosion, electrical shorts, damaged connectors or wiring harnesses, and impact forces to the rear of the vehicle. Software or configuration faults can also render a unit non-functional; in such cases diagnostics with a compatible scan tool is recommended to confirm the root cause.
Replacement And Installation Notes
Replacement is typically straightforward for a trained technician but requires caution. General procedure:
- Disconnect the negative battery terminal before starting to avoid electrical damage.
- Locate the parking assist ECU (commonly fitted in the rear luggage compartment area, behind trim panels or under the trunk floor; exact location varies by model).
- Release retaining clips or fasteners, unplug multi-pin connectors, and remove the defective unit.
- Fit the replacement unit, reconnect connectors and secure mounting. Reconnect the battery and clear any stored faults with a diagnostic tool.
Important: Some ECU replacements require software coding, module pairing or configuration with a dealer-level or aftermarket diagnostic tool to fully restore system functionality. If in doubt, have the unit programmed and tested by a qualified technician.
Compatibility And Fitment
This control unit is intended for selected Citroën and Peugeot vehicles equipped with PSA parking sensor systems. Fitment is determined by OEM part number: 9629825480 and 659078 (also referenced as 601746). Always verify compatibility by comparing the part number on the existing unit or by checking the vehicle VIN with your parts supplier or service manual before purchase.
Technical Information
- Manufacturer: PSA (Citroën/Peugeot)
- Model: Selected Citroën and Peugeot models equipped with PSA parking assist systems (verify fitment)
- Product Codes: 9629825480, 659078
- Other Numbers: 601746, NFP
Recommendation
For reliable operation, diagnose faults with a suitable scan tool before replacing the ECU. If replacement is required, ensure correct part number match and consider professional installation and coding to avoid configuration issues. This product is aimed at professional mechanics and competent DIYers who can follow vehicle-specific repair procedures.
