Description
Overview
This Parking Assistant Control Unit is designed for Citroën and Peugeot vehicles and manages the parking sensor system. Identified by part numbers 9629825280 and 659078, the unit processes ultrasonic sensor signals, communicates with the vehicle network and triggers acoustic and visual parking alerts. It is aimed at professional mechanics and competent DIY enthusiasts who search by product codes for a direct replacement.
Function And Benefits
The control unit interprets distance measurements from the parking sensors and controls the driver feedback (beeper, dashboard indicator or infotainment display). Key benefits include:
- Precise processing of multiple ultrasonic sensors to determine obstacle distance.
- Integration with the vehicle CAN bus for status reporting and fault detection.
- Reliable activation of audible warnings and visual indicators during low-speed maneuvers.
- Direct-fit replacement when matched by correct part numbers, reducing diagnostic time.
Installation And Replacement
Basic replacement steps (general guidance only):
- Disconnect the vehicle battery before starting to avoid short circuits and to protect sensitive electronics.
- Locate the original unit – commonly found in the rear area of the vehicle (boot trunk lining, under the rear shelf, behind bumper trim or near the central body control modules) depending on the model.
- Carefully unplug the multi-pin connectors and remove any securing screws or clips.
- Fit the replacement unit, secure it in place and reconnect all connectors ensuring good contact and no bent pins.
- Reconnect the battery, then run a diagnostic tool (for example PSA diagnostic systems such as DiagBox) to clear codes and perform any required module recognition or coding; many parking ECUs require software pairing to the vehicle.
- Test all parking sensors and perform a road/parking test to confirm correct operation of acoustic and visual alerts.
Common Faults And Durability
Typical causes of control unit failure include moisture ingress, corrosion on connectors, impact damage, wiring short circuits or voltage spikes. In many cases a faulty sensor or damaged wiring can mimic ECU faults, so verify sensor condition and connector integrity before replacing the control unit. Lifespan varies with vehicle use and environment; units exposed to water or road salt are at higher risk of premature failure.
Technical Information
- Manufacturer: PSA Peugeot Citroën
- Model: Various Citroën and Peugeot models (see product codes for fitment)
- Product Codes: 9629825280, 659078
- Other Numbers: 601.746, NFP
If you are a professional technician or a skilled DIYer, use the part numbers to confirm exact vehicle fitment before purchase. Correct installation usually requires disconnecting the battery and performing a diagnostics/coding step after fitting. For fitment questions or compatibility checks, provide your VIN or existing part number to ensure a precise match.
