Weichai & Light Vehicles · Engine application
CP1H & CP4.1 Common-Rail Pumps — Light Commercial Vehicles
High-pressure pumps for Citroën Jumper, Peugeot Boxer and JMC diesel applications.
Light commercial diesel runs the Bosch CP pump family: CP1H on the Citroën Jumper / Peugeot Boxer 2.3–3.0L Euro 4/5 vans, CP4.1 on JMC Euro IV/V applications. We supply 0445010320 (CP1H) and 0445020521 (CP4.1, sister reference CN3-9B395-AB).
CP pumps differ by rail pressure and mounting — confirm the pump version by the number on the old unit before ordering.
What we supply for this engine
Part numbers listed
| Part no. | Product | Condition | MOQ |
|---|---|---|---|
0445010320 | 0445010320 CP1H High-Pressure Pump — Citroën Jumper / Peugeot Boxer 2.3-3.0L | New (reproduction) | 1 box |
0445020521 | 0445020521 CP4.1 Common Rail Pump — JMC Euro IV / V | New (reproduction) | 1 pc |
Where buyers go wrong
Mix-ups we see on this engine
CP4.1 vs CP4.2. They share the platform but differ in details — match the stamped number on your old pump.
CP1H vs CP4.1. Different rail pressures and mountings — not interchangeable by vehicle brand alone.
Engine FAQ
Questions buyers ask about the CP1H / CP4.1 Pumps
Which pump fits a Citroën Jumper?
The CP1H — 0445010320 — for the 2.3L to 3.0L Euro 4/5 engines, also used on the Peugeot Boxer. Confirm by the old pump's number.
What is the JMC pump number?
0445020521, the CP4.1 for JMC Euro IV/V applications, with sister reference CN3-9B395-AB. CP4.1 and CP4.2 share the platform but differ in details.
Are CP1H and CP4.1 interchangeable?
No — they differ by rail pressure and mounting. The number on your old pump settles the version.
Fitment questions go to our technical team · Related reading in the buying guides.
Send the number from your old unit
We confirm the version, supply status and price for the CP1H / CP4.1 Pumps part you need.
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