Description
Control unit for the suspension system for Citroën and Peugeot vehicles. It is from a Citroën C4 Picasso.
This suspension control unit is designed for Citroën and Peugeot applications and is commonly referenced by OE/product numbers. Suitable for professional workshops and experienced DIYers searching by part codes (see Technical Information). The unit manages electronic suspension functions and communicates with vehicle sensors and actuators to maintain ride comfort and vehicle stability.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4 Picasso
- Product Codes: 9665811380, 0X080336
- Other Numbers: 5273N1, 5273P4, 5273N2
Key Function
- Processes inputs from vehicle sensors (ride height, wheel speed, accelerometers, load sensors) and controls suspension actuators (valves, pumps or adaptive dampers where fitted).
- Maintains correct ride height, damping response and improves ride comfort and handling by adapting suspension settings to driving conditions.
- Interfaces with other vehicle systems via the vehicle communication network to coordinate stability and safety functions.
Installation Recommendations
- Always disconnect the battery before starting work to avoid electrical damage.
- Locate the unit according to the vehicle service manual (common locations: engine bay, inner wing, or near the suspension hydraulic pump). Protect the connectors from contamination when unplugging.
- Label connectors and fasteners before removal to ensure correct reassembly. Inspect wiring and connectors for corrosion or damage and repair as necessary.
- After mechanical installation, perform suspension initialization and any required calibration using an appropriate diagnostic tool capable of performing suspension setup procedures.
- If unsure, have the installation and calibration performed by a qualified technician with access to proper diagnostic equipment.
Most Common Cause Of Failure
- Water ingress and corrosion of electrical connectors leading to intermittent faults or permanent failure.
- Electrical damage from voltage spikes, poor ground connections or battery jump-starting errors.
- Internal electronic component wear or age-related degradation after long service life, especially in vehicles exposed to road salt and moisture.
- Failing hydraulic components or sensors that overload the unit or produce erroneous inputs, which can mask the root cause.
Replacement Procedure (Overview)
- Park the vehicle on a level surface, engage the parking brake and disconnect the negative battery terminal.
- Access the control unit location and remove any covers or brackets obstructing removal.
- Carefully unplug electrical connectors (label them if necessary) and unbolt the unit from its mounting.
- Fit the replacement unit, secure all fasteners and reconnect connectors. Ensure all seals and grommets are correctly seated to prevent moisture ingress.
- Reconnect the battery and use a diagnostic tool to perform any required initialization, calibration or fault clearing for the suspension system.
Searchable by OE numbers: 9665811380, 0X080336, 5273N1, 5273P4, 5273N2 — enter these codes to quickly confirm fitment for compatible Citroën and Peugeot models. Suitable for mechanics and competent DIY technicians who follow manufacturer procedures and use appropriate diagnostic equipment.
