Weichai & Light Vehicles · Engine application
Weichai WP12 Common-Rail Injectors — G3 / G4
CR injectors for WP12 G3 and G4 engines — calibration differs between construction and truck applications.
The Weichai WP12 runs a common-rail injection system whose calibration differs between the G3 and G4 generations and between construction and truck applications. We supply 0445120266, confirmed by the number on your old injector.
As with every common-rail line, the engine model alone does not select the part — send the stamped number and we confirm before quoting.
What we supply for this engine
Part numbers listed
| Part no. | Product | Condition | MOQ |
|---|---|---|---|
0445120266 | 0445120266 Common Rail Injector — Weichai WP12 G3 / G4 | New (reproduction) | 1 pc |
Where buyers go wrong
Mix-ups we see on this engine
G3 vs G4. Two WP12 generations with different calibration — match the stamped number on the old injector.
Engine FAQ
Questions buyers ask about the Weichai WP12
Which injector fits the Weichai WP12?
0445120266 for the WP12 G3 / G4 engines. The G3 and G4 generations differ in calibration — confirm by the old injector's stamped number.
Is WP12 calibration the same for trucks and construction machines?
No — calibration differs between applications. The stamped number on the old unit decides.
Do you supply other Weichai numbers?
Send the complete number from your old unit and we check it against the catalog.
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 Weichai WP12 part you need.
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