Description
Product Overview
ECU Parking Assist module for Citroën and Peugeot vehicles. This electronic control unit manages ultrasonic parking sensors and park-aid functions, interpreting sensor signals and triggering audible/visual warnings. The unit corresponds to OEM numbers 9629825380 and 659078 and is intended for professional garages and experienced DIYers who perform electrical and diagnostic work on PSA vehicles.
Function and Role
The parking assist ECU receives input from the vehicle's ultrasonic sensors, processes distance and obstacle data, and commands the instrument cluster, parking display, and acoustic warnings. In systems with automated parking features the unit may also exchange information with other control modules to support manoeuvring aids. Proper operation is essential for reliable parking assistance and driver alerts.
Replacement And Installation Notes
Typical replacement steps (general guidance):
- Disconnect the vehicle battery before handling any control units to avoid electrical damage.
- Locate the parking assist ECU (position varies by model: commonly in the trunk area, rear quarter panel, or behind dashboard trim).
- Release retaining clips and disconnect wiring harnesses carefully, noting connector orientations.
- Install the replacement unit, secure mounts, reconnect harnesses and restore battery power.
- Perform a diagnostic scan and sensor test. Many PSA systems require coding or pairing of the ECU to the vehicle network; professional diagnostic equipment may be necessary to clear fault codes and complete adaptation.
If you are not experienced with vehicle electronics or coding procedures, seek professional installation to ensure full functionality and safety.
Common Failure Modes
Parking assist ECUs are generally reliable but can fail due to water ingress, corrosion, impact damage from collisions, wiring faults or voltage spikes. Symptoms of a failing unit include intermittent or complete loss of parking sensor signals, constant warning beeps, false detections, or persistent fault codes on diagnostic tools. Replacing the ECU often requires subsequent diagnostics and sensor verification.
Technical Information
- Manufacturer: PSA (Citroën / Peugeot)
- Model: Various Citroën and Peugeot models equipped with compatible parking assist systems (verify fitment by product codes)
- Product Codes: 9629825380, 659078
- Other Numbers: 601746, NFP
Before ordering, compare the listed OEM/product codes with your vehicle's existing unit. Compatibility checks help avoid returns and ensure the unit supports your vehicle's sensor configuration. If in doubt, provide your VIN to the supplier or consult a professional technician to confirm fitment and coding requirements.
