Description
Hydroactive suspension controller with SPORT button for CITROËN C5
High-quality replacement controller for the Hydroactive suspension system fitted on Citroën C5 models. This electronic control unit (ECU) manages ride height and damping behaviour and provides the SPORT mode activation for a firmer, more dynamic setup. Ideal for professional workshops and experienced DIY mechanics looking to restore correct suspension function or to replace a failed SPORT control. Commonly searched using product codes 9633261277 and 9627701677 — include these references when ordering to speed up identification.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C5
- Product Codes: 9633261277, 9627701677
- Additional Numbers: 9654308077, 655487, 6554EW, NFP
Overview and Function
The Hydroactive suspension controller is the electronic brain of Citroën’s hydraulic suspension system. It processes inputs from ride-height sensors, vehicle speed, steering and driver commands (including the SPORT button) to control hydraulic valves, the pump and servovalves. Activating SPORT mode changes the control strategy to provide a firmer ride and reduced body roll for a sportier driving feel. Correct operation is essential for ride comfort, handling and vehicle safety.
How Replacement Is Performed
- Prepare Vehicle: Park on a level surface, engage parking brake and support vehicle safely on jack stands if wheels or underbody access is required.
- Power Isolation: Always disconnect the negative battery terminal before starting work to avoid electrical damage.
- Access Unit: Remove any trim or covers protecting the controller; location varies by model year (refer to vehicle repair manual).
- Disconnect Connectors: Carefully release electrical connectors and secure hydraulic lines or related components out of the way. Inspect connectors for corrosion or damage.
- Fit New Unit: Mount the controller in the original position, reconnect connectors, and secure mounting fasteners to manufacturer torque where specified.
- System Commissioning: Reconnect battery, clear stored fault codes and perform any required system initialisation or adaptations with a PSA-capable diagnostic tool. Verify correct ride height, perform a short road test and check for leakage or fault codes.
Installation Recommendations
- Always Disconnect Battery Before Work: Prevents damage to sensitive electronics and reduces risk of short circuits.
- Use Proper Diagnostic Equipment: A PSA-compatible diagnostic tool simplifies fault clearing, sensor calibration and system checks after fitting.
- Inspect Surrounding Hardware: Check hydraulic hoses, spheres, pump and electrical connectors — replacing a controller without addressing hydraulic faults can lead to repeat failures.
- Secure Mounting And Clean Contacts: Ensure connectors are clean and firmly seated to avoid intermittent faults caused by vibration or moisture.
- If Uncertain, Use Qualified Technician: Installation and commissioning may require specialist tools and knowledge of hydraulic systems.
Why This Part Most Commonly Fails
- Electrical Faults: Corrosion or moisture ingress in connectors and wiring can cause intermittent operation or complete failure of the controller.
- Age And Heat: Thermal stress and long-term exposure reduce component reliability, especially on older vehicles with high mileage.
- Hydraulic System Issues: Contaminated fluid, failing spheres or a weak pump increase load on the controller and can trigger faults or damage.
- Physical Damage: Impact, improper handling during previous repairs or poor mounting can lead to failure.
- SPORT Button Wear: Frequent use or faulty switches can prevent SPORT mode selection even when the controller itself is functional.
Fitment And Compatibility
Designed to suit Citroën C5 vehicles fitted with Hydroactive suspension. Check the product codes listed above against the vehicle’s original part number to confirm compatibility before ordering.
Order this Hydroactive suspension controller if you need a direct-fit replacement for a Citroën C5 with SPORT function. Using the correct product codes ensures faster delivery and correct selection for workshop replacement.
