Description
Obstacle detection control unit for CITROEN and PEUGEOT cars
Part description
This parking assistant control unit (obstacle detection) is used to evaluate the signal from the sensors and control the function of the parking system. This is a used original part for Citroën/Peugeot cars, searched most often by OEM number 9651662680 or by other designations listed below.
A suitable solution when the parking assistant stops working, reports a malfunction or does not respond consistently – replacing the unit is usually faster and more economical than a lengthy search for a fault in the entire system.
Technical information
- Manufacturer: Stellantis
- Model: not specified
- Other numbers: 601.882, 6590T3, 6590T4, NFP
Product codes
- Product codes: 9651662680, 6590T3
Installation recommendations
Generally/typically for parking assistant control units, the exact location and procedure may vary depending on the specific model and equipment of the car. Below is a safe general procedure for replacing this type of electrical part.
1) Before assembly
- Compare the part numbers on the unit with the old one: especially 9651662680 and possibly 6590T3 / 6590T4.
- Check the condition of the connectors: cracks, twisted pins, leaks, corrosion.
- Inspect the connector locks and unit mounts for damage.
2) Necessary tools and materials
- Basic set of screwdrivers and socket wrenches (depending on the model of the car)
- Plastic crowbar for removing upholstery/covers (typical)
- Electrical contact cleaner (recommended)
- Insulating tape / textile tape for the bundle (as needed)
3) Step-by-step assembly procedure
- Turn off the ignition and wait for the car to sleep (typically a few minutes).
- Disconnect the battery (minus pole) to protect the electronics.
- Get access to the unit (removal of the cover/upholstery according to the specific design of the car).
- Document the wiring (photo of connectors/harness) for proper reassembly.
- Unlock the connector(s) and carefully disconnect the connector(s) – do not pull on the wiring.
- Unscrew/unclip the unit mount and remove the old part.
- Compare the old and new unit again (labels, numbers, connector type).
- If the contacts are dirty, treat the connectors with contact cleaner and let them air out.
- Install the unit in the bracket and fix it in the original way.
- Connect the connector(s) as far as they will go and secure the connectors/locks.
- Fold back the removed covers/upholstery so that the wiring is not pinched anywhere.
- Connect the battery and turn on the ignition.
-
4) Post-assembly checks and test drive/function verification
- Verify that the parking assistant reacts as standard (activation, beeps/displays depending on the car’s equipment).
- If the system does not work, check the security of the connectors and the condition of the wiring to the sensors.
- Basic diagnostics will also typically help to determine whether the unit is communicating and whether there are no defects in the sensor circuit.
5) The most common assembly mistakes + how to avoid them
- Battery not disconnected → risk of damage to electronics; always disconnect before handling the unit.
- Switched/incorrectly snapped connectors → the unit does not communicate; always press the connector down and secure it with a fuse.
- Ignoring oxidation in the connector → intermittent faults; clean the connectors and check the pins.
- Mechanical stress on the cabling when folding the covers → later interruption of the wires; run the cables in their original routes.
Reasons why the part is damaged
- Moisture and seepage into the area of the unit or connectors (corrosion, unstable communication).
- Oxidation/loose contacts in the connector, possibly damaged connector locks.
- Voltage fluctuations in the on-board network (weak battery, inappropriate starting via cables, disconnecting the battery without the correct procedure).
- Damage to the wiring to the sensors (pinching, abrasion, interference after body repair).
- Impact/vibration or improper handling during disassembly and assembly.
