Description
2.0 HDi 100 kW RHR/RHK injection pump with SIEMENS VDO 5WS40019 for Citroën, Peugeot, Ford, Volvo, Mazda. Tested, with functional warranty. With fuel pressure regulator.
Description
This high‑pressure injection pump is designed for 2.0 HDi diesel engines (100 kW) fitted in a range of Stellantis and partner vehicles. Built around the Siemens VDO 5WS40019 system, the unit includes an integrated fuel pressure regulator and is intended as a direct-fit replacement for vehicles using RHR/RHK engine variants. The pump is commonly referenced by OE or aftermarket numbers such as 1920QH, 1920N8 and related Siemens VDO codes — customers often search by these product codes when locating the correct part.
Compatibility
Typical vehicle applications include, but are not limited to:
- Citroën C4, C4 Picasso, C5, C5 (X7), C8
- Peugeot 307, 407, 607, 807
- Also used in certain Ford, Volvo and Mazda models sharing the 2.0 HDi RHR/RHK engine platform
Technical Information
- Manufacturer: Siemens VDO
- Model: 2.0 HDi 100 kW (RHR / RHK)
- Product Codes: 5WS40019, 5WS40809, 5ws40019
- Other Numbers: 9658193980, 9688153080, 1920QH, 1920N8
Function
The injection pump provides high fuel pressure required by the injectors for precise diesel atomization and combustion. It regulates delivery pressure via the integrated pressure regulator and synchronizes fuel pulses with engine timing. Proper pump operation is essential for engine performance, fuel economy and emissions control.
Replacement Procedure (Overview)
Replacement of the injection pump requires careful attention to timing, fuel system priming and leak-free connections. Typical steps include:
- Relieve fuel system pressure and disconnect the battery before work begins.
- Remove intake components and ancillary parts to access the pump.
- Mark timing positions and note drive coupling orientation to preserve engine timing reference.
- Disconnect fuel lines and electrical connectors, then remove the pump.
- Install the new pump using new sealing washers/O‑rings where applicable, align timing marks, and torque fasteners to manufacturer specification.
- Prime and bleed the fuel system, then perform an engine start and check for leaks and correct idling.
Because timing accuracy and correct priming are critical, follow the vehicle manufacturer’s service manual throughout the operation.
Installation Recommendations
- Always disconnect the negative battery terminal before starting work.
- Replace all associated seals, O‑rings and any fuel line crush washers to ensure leak‑free joints.
- Use clean diesel and keep work area contamination‑free; small particles can damage pump internals.
- After fitting, fully bleed the fuel system and verify correct pressure and engine timing before road testing.
- If available, use factory or equivalent diagnostic tools to confirm correct fuel pressure and adaptions.
Why This Part Commonly Fails
- Fuel Contamination: Dirt, water or poor‑quality diesel causes accelerated internal wear or blockage of valves and passages.
- Wear and Tear: High mileage leads to internal component wear (pistons, vanes, seals), reducing pressure generation.
- Faulty Pressure Regulator: A malfunctioning regulator causes incorrect system pressure, poor drivability or hard starting.
- Improper Maintenance: Neglecting fuel filter changes or running with contaminated fuel shortens pump life.
- Installation Errors: Incorrect timing or improper priming after replacement can lead to poor engine performance or damage.
Why Buy This Pump
If you are repairing a 2.0 HDi engine showing symptoms such as difficult starting, loss of power, excessive smoke or fuel pressure faults, selecting the correct Siemens VDO 5WS40019 pump (matching the listed product codes) restores proper fuel delivery and engine response. The unit is frequently found by searching the OE/product numbers — using the correct code ensures fitment and performance.
Note
Search by product code (e.g. 1920QH, 1920N8, 9658193980) to quickly find exact matches for your vehicle. Follow manufacturer procedures and safety precautions during replacement to avoid damage.
