Description
Electric power steering pump for Citroën C4 Picasso and Grand Picasso (first generation).
Direct-fit electric servo pump compatible with OE references 9684252580 and 4007WK. Designed for mechanics and experienced DIYers, this unit restores reliable steering assistance, reduces noise and vibration, and returns the hydraulic system to proper operating pressure. Ideal when the original pump shows symptoms of wear or leakage, it helps re-establish safe, predictable steering feel on first-generation C4 Picasso models.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4 Picasso; Citroën Grand C4 Picasso (First Generation, 2006–2013)
- Product Codes: 9684252580; 4007WK
- Other Numbers: 4007WK; 9684252580
Installation Recommendations
Before starting any work, always disconnect the battery and follow the manufacturer’s removal and installation procedures. Typical replacement steps:
- Park the vehicle on a level surface and secure it; relieve system pressure if required.
- Disconnect the battery to prevent electrical damage.
- Drain or capture power steering fluid from the circuit to avoid contamination.
- Disconnect hydraulic lines and electrical connector from the pump (collect remaining fluid and cap lines).
- Unbolt and remove the old pump; replace any sealing rings or gaskets.
- Install the replacement pump, torque fasteners to manufacturer specifications, and reconnect hydraulic lines and electrical connector.
- Refill with manufacturer-specified power steering fluid and bleed the system by turning the steering wheel lock-to-lock while following the service procedure.
- Check for leaks, verify steering assistance operation, and clear any diagnostic codes if present.
For accurate bleeding, diagnostics or any required calibration, use appropriate PSA service literature and tools. If uncertain, have the final checks performed by a qualified technician.
Why The Part Fails
Common causes of failure include internal motor wear (brushes or armature), hydraulic seal deterioration leading to leaks, contamination in the fluid causing premature wear, corrosion or damage to electrical connectors, and thermal or electrical stress. Symptoms of a failing pump are increased steering effort, whining or grinding noises during steering, visible fluid leaks, warning lights or steering assistance faults, and intermittent loss of assistance.
Additional Notes For Mechanics and DIYers
Replace contaminated fluid and any damaged hoses or fittings to prevent premature failure of the new pump. After replacement, perform a complete system bleed and road test to ensure correct operation. Keep OE part numbers handy (9684252580, 4007WK) as the part is frequently searched by these references.
