Description
Injection pump 2.0 HDi 100 kW RHR with DELPHI 5WS40019 system for Citroën, Peugeot, Ford, Volvo, Mazda vehicles. Without fuel pressure regulator. Tested, with warranty of functionality.
Key Features And Applications
This Delphi high-pressure injection pump is designed for 2.0 HDi RHR engines with approximately 100 kW output. It is compatible with multiple Stellantis applications and related platforms, commonly fitted to vehicles such as Citroën C5 (including X7) and Peugeot 407, and found in certain Ford, Volvo and Mazda diesel models that share the 2.0 HDi RHR configuration. The pump uses the DELPHI 5WS40019 control system and is supplied without an integrated fuel pressure regulator.
Why Choose This Pump
Ideal for professional workshops and experienced DIY mechanics looking for an exact-fit replacement by part number. The pump matches original equipment specifications for delivery and control when installed and timed correctly. Frequent search terms include part numbers 9656391680, 9424A000A, 1920LP and 1921N3 — entering these codes will help you find the right unit quickly.
Technical Information
- Manufacturer: Delphi
- Model: Injection Pump 2.0 HDi RHR 100 kW
- Product Codes: 5WS40019
- Other Numbers: 9656391680, 9424A000A, 1920LP, 1921N3
Installation Recommendations
- Preparation: Work On A Cold Engine, Disconnect The Battery And Relieve Fuel System Pressure Before Starting.
- Timing: Mark And Align Engine Timing And Pump Timing Marks Precisely. The Pump Must Be Installed With Correct Angular/Timing Position To Avoid Engine Damage.
- Seals And Fittings: Replace All Gaskets, O-Rings And Banjo Fittings; Use New Seals To Ensure Leak-Free Operation.
- Bleeding: Prime And Bleed The Fuel System Thoroughly After Installation To Remove Air; Use A Hand Primer Or Diagnostic Tool Where Available.
- Electrical And Calibration: Verify Electrical Connections And Actuators. Some ECUs May Require Adaptation Or Clearing Of Fault Codes After Replacement.
- Final Checks: Inspect For Leaks, Check Fuel Pressure And Perform A Road Test To Confirm Smooth Idle And Delivery Across The Rev Range.
- Recommendation: If You Are Unsure About Timing Or Calibration Steps, Use Professional Workshop Tools Or Seek Assistance From A Trained Technician.
Most Common Causes Of Failure
High-Mileage Wear: Pump components such as plungers and delivery valves wear over time, especially beyond 150,000 km depending on service history. Contaminated Fuel: Dirt, water or poor-quality diesel accelerates internal wear and can seize moving parts. Fuel Supply Issues: Faulty lift pumps, clogged filters or air ingress cause cavitation and premature damage. Electrical Or Control Faults: Failures of solenoids or control actuators in the DELPHI system can disrupt timing and delivery. External Leaks: Degraded seals and connections lead to loss of pressure and performance.
Practical Notes For Mechanics And DIYers
Search By Part Number For Fast Identification: Use OE Codes 9656391680, 9424A000A, 1920LP or the DELPHI reference 5WS40019 to locate the matching pump. Check Fuel And Filter Condition Before Installing A New Pump To Avoid Early Re-Failure. Keep A Record Of Mileage And Symptoms — Typical Signs Of A Failing Pump Include Hard Starting, Loss Of Power, Excessive Smoke And Fuel Leaks.
