Description
Suspension control unit for Citroën and Peugeot vehicles. It is from a Citroën C4 Picasso.
This suspension control unit (electronic control module) is a direct-fit replacement frequently searched under part numbers 9665811380, 0X080336, 5273N1 and related references. Designed for professional workshops and experienced DIY mechanics, the unit manages suspension electronics to restore correct damping and ride-height behaviour. Installing a correct and fully functional control unit helps eliminate fault codes, irregular ride height, or abnormal damping that affect vehicle safety and comfort.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 Picasso (typical fitment)
- Product Codes: 9665811380, 0X080336, 5273N1, 5273P4, 5273N2
- Additional Numbers: Other PSA/OEM references may apply; compare the unit’s printed codes before installation
Function And Compatibility
The module controls the suspension system electronics — reading sensor inputs (height/position sensors, wheel/vehicle speed via CAN) and commanding actuators or valves to regulate damping and ride height. It communicates over the vehicle CAN bus and works in conjunction with suspension sensors, pumps/valves and the vehicle’s central network. Compatibility is primarily determined by the product codes listed above; technicians commonly search by these numbers when sourcing the correct unit.
How To Replace
Replacement should be performed by a skilled technician or an experienced DIYer with appropriate tools. General steps: safely disconnect the negative battery terminal before starting; locate the module (refer to the specific workshop manual for the exact location — typically mounted near suspension components or on a protected chassis bracket); carefully unplug electrical connectors and remove mounting fasteners; install the new unit, secure connectors and mountings; reconnect the battery. After physical installation, perform diagnostic checks and clear stored faults.
Installation Recommendations
- Always Disconnect The Battery Before Work To Prevent Damage To The Module.
- Handle Connectors With Care; Inspect Pins And Seals For Corrosion Or Damage.
- Secure The Module To The Original Mounting Points To Avoid Vibration And Water Ingress.
- After Installation, Use A Compatible PSA Diagnostic Tool (e.g., DiagBox/Service Scanner) To Clear Fault Codes And Perform Any Required Initialization Or Adaptation Procedures.
Most Common Failure Causes
- Water Ingress And Corrosion Of Connectors Or Circuitry Leading To Intermittent Or Permanent Electrical Faults.
- Electrical Short Circuits Or Voltage Spikes Causing Component Damage.
- Physical Damage From Impacts Or Improper Mounting.
- Associated Sensor Or Actuator Failures That Stress The Control Module Or Trigger Error Codes.
- Age-Related Electronic Component Degradation.
Search By The Part Numbers Listed Above When Looking For Compatible Units Or When Diagnosing Fitment. Correct identification by product code reduces installation time and avoids mismatches.
