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Bosch 0445120266 is the Bosch type CRIN solenoid common rail injector with a black two stud solenoid cap, a polished steel body with a locating collar and O rings, and a slim nozzle. It is used on Weichai WP10 and WP12 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Common Rail Fuel Injector |
| Replaces | Bosch 0445120266 |
| Injector type | Solenoid common rail (CRIN) |
| Engine | Weichai WP10, WP12 |
| Fits | the Weichai WP10 and WP12 diesel engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 840999 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Bosch Part No.(SPM Part No.) | Fits |
|---|---|
| 0445120266(SPM-HEP-4892) | the Weichai WP10 and WP12 diesel engines |
What it does
A common rail injector opens electrically several times per combustion stroke, spraying fuel at very high pressure. Its timing and flow are set by the engine controller using the trim code on its body.
Where it is used
Made for the Weichai WP10 and WP12 diesel engines. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (6 aftermarket sellers) | USD 61.99 to 102.81 | 1 Nov 2026 |
| FridayParts | USD 90.51 | 1 Nov 2026 |
| SINOCMP | USD 109.00 | 1 Nov 2026 |
| Fab Heavy Parts | USD 219.74 | 1 Nov 2026 |
| WDPart | USD 230.00 | 1 Nov 2026 |
| Spare Part Mart | USD 46.83 | Today |
Our price of USD 46.83 is 24% to 80% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Weichai WP10, and 1 more listed under compatible equipment. Check the old fuel injector is marked 0445120266 or one of the cross references, because makers change parts between serial ranges.
On the Weichai WP10, often 5,000 to 10,000 hours, but much less on poor or wet fuel. Injectors are usually changed when they fail a test, not by hours.
Black or white smoke, a misfire or knock on one cylinder, hard starting, higher fuel use, or a high return leak or balance rate on test.
Run a return leak test or read the injector balance rates with a diagnostic tool. On older mechanical engines, cracking each pipe in turn at idle shows which cylinder changes least.
Most common rail injectors carry a trim code (QR or IMA) printed on the body. Enter it with a diagnostic tool after fitting, or the engine runs rough and smokes.
No. It is an aftermarket fuel injector made to replace the Bosch 0445120266. It is not made by the original manufacturer; the number only shows what it replaces.
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