This Hydroactive suspension controller with integrated SPORT button is designed for Citroën C5 models equipped with Hydractive suspension. The unit manages suspension behavior, delivering firmer damping and reduced body roll when SPORT mode is engaged. Ideal for professional workshops and skilled DIY enthusiasts, this controller is often searched by its part numbers (9633261277, 9627701677, 9654308077, 655487, 6554EW) — include these references when locating the correct replacement.

The controller communicates with height sensors, hydraulic valves and the suspension pump to regulate ride height and damping in real time. In SPORT mode it alters control maps to tighten suspension response for improved handling. Typical fitment is on Citroën C5 models equipped with Hydroactive (Hydractive) suspension systems. Replacing the unit restores electronic control over the hydraulic system and the SPORT function when the original module is faulty.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C5 (vehicles Equipped With Hydroactive Suspension)
• Product Codes: 9633261277, 9627701677
• Additional Numbers: 9654308077, 655487, 6554EW

Key Features & Function

• Electronic control of hydraulic suspension: adjusts damping and ride height according to driving conditions.
• SPORT Button: selects a more aggressive control map for firmer handling and reduced body movement.
• Interfaces With: height sensors, suspension pump, solenoid valves and vehicle CAN bus for coordinated chassis control.

Symptoms Of A Failing Unit

• Loss Of SPORT Mode Functionality Or No Response From The SPORT Button.
• Inconsistent Ride Height, Unresponsive Suspension Or Warning Lights Related To Suspension.
• Intermittent Operation Or Complete Failure Of Automatic Height Control.

Replacement And Installation Guidance

Suitable For Experienced Technicians And Competent DIY Mechanics. Recommended Steps:

1. Secure The Vehicle On Level Ground And Ensure Safe Support Before Work.
2. Disconnect The Battery Before Starting Work To Avoid Electrical Damage Or Short Circuits.
3. Locate The Hydroactive Controller (Location Varies By Model — Often Mounted In Engine Bay Or Behind Interior Panels).
4. Unplug Electrical Connectors Carefully, Note Locking Tabs And Any Seals To Prevent Water Ingress On Reassembly.
5. Remove Fasteners, Extract The Old Unit And Fit The Replacement In Reverse Order.
6. After Mechanical Fitment, Perform Any Required Initialization Or Adaptation — Some Vehicles May Require Diagnostic Tool Procedures To Restore Full Functionality.
7. Verify System Operation: Check Height Control, SPORT Mode, And Perform A Road Test To Confirm Correct Behavior.

Installation Recommendations

• Always Disconnect The Battery Before Removing Or Installing The Unit.
• Protect Connectors From Moisture And Corrosion; Replace Damaged Seals And Check Wiring Harness For Wear.
• Use Appropriate Diagnostic Equipment To Read Fault Codes And Confirm Correct System Initialization After Replacement.
• Follow Manufacturer Service Procedures And Torque Specifications Where Applicable.

Most Common Causes Of Failure

• Water Ingress And Corrosion Around Connectors Or The Module Housing Leading To Electrical Faults.
• Age-Related Electronic Component Degradation Or Thermal Stress Causing Intermittent Or Permanent Failures.
• Damaged Wiring Or Poor Ground Connections Affecting Communication With Sensors And The Pump.
• Voltage Spikes Or Improper Jump-Starting That Can Damage Internal Electronics.

Part numbers and model references are included for reliable searching — enter the listed codes when sourcing the correct Hydroactive controller for Citroën C5. This description targets mechanics and competent DIYers who require clear technical guidance and practical installation advice.