0445120391 CRIN2 Injector Replacement for Bosch, Weichai 612630090055
New 0445120391 common rail injector (Bosch CRIN2-16 reference, Weichai 612630090055) for Weichai WP10 / WP12 / WP13 heavy-duty diesel engines. A Vidishi Auto compatible replacement, 1800 bar, Euro IV/V, 12-month warranty. Single package 28x12x12 cm / 1.5 kg gross. Wholesale export supply.
Original price was: $89.00.$65.00Current price is: $65.00.
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Product Specifications
| Weight | 1.5 kg |
|---|---|
| Dimensions | 28 × 12 × 12 cm |
| make | |
| model | |
| engine | Weichai WD10, Weichai WD615, Weichai WP10, Weichai WP12, Weichai WP13 |
| position |
Product Details
0445120391 Common Rail Injector by the Numbers
Verified identity and fitment data for the complete diesel common rail injector, supplied for the Weichai WP-series heavy-duty range.
Each 0445120391 common rail injector is a complete heavy duty diesel injector rather than a bare spray tip: this fuel injector carries the 0 445 120 391 reference on the body and serves Weichai WP10, WP12, WP13, WD10 and WD615 engines in trucks, machinery, marine units and generator sets.
Vehicle Compatibility for 0445120391
This complete injector runs the Weichai WP10 / WP12 / WP13 / WD10 / WD615 common rail diesel engines in Weichai-built trucks, construction machinery, marine units and generator sets. Match the engine nameplate and the number on the old injector before ordering.
| Engine | Series | Typical application | Injector |
|---|---|---|---|
| Weichai WP10 | 10 L | Heavy trucks, construction | 0445120391 |
| Weichai WP12 | 12 L | Heavy trucks, tractors | 0445120391 |
| Weichai WP13 | 13 L | Heavy haulage | 0445120391 |
| Weichai WD10 | 10 L | Industrial, machinery | 0445120391 |
| Weichai WD615 | Steyr-based 10 L | Legacy heavy duty | 0445120391 |
Weichai WP12 injector12 L heavy-duty
Weichai WP13 injector13 L heavy haulage
Weichai WD10 injector10 L industrial
Weichai WD615 injectorSteyr-based 10 L
Most buyers arrive with a Weichai engine injector number alone, so we keep the whole family in one place. Send the nameplate and we confirm whether the 0445120391 Weichai unit is the one you need; the same reference is also listed as a common rail injector for Weichai WP-series trucks and as a Weichai common rail injector on the CRIN2-16 platform. Interchange numbers also seen across sources: 0445120667, 1000160137, 3210059 and CRIN2-16-BL.
Fitment verification
- VIN or chassis number — we decode the build record to confirm the engine family.
- Engine code plate — the plate on the block must read Weichai WP10, WP12, WP13, WD10 or WD615, not another Weichai family.
- Photo of the old unit — the etched number stamped on the injector body, so we match the code and not just the engine.
About the 0445120391 Injector
What the complete CRIN2-16 unit is, and how it sits in the Weichai fuel system.
What is a common rail injector?
A common rail injector is the solenoid unit that meters and atomises fuel from the rail into the combustion bowl. The 0445120391 is a complete common rail injector unit in the Bosch CRIN2-16 family: the whole injector, not just the spray tip.
How does a common rail injector work?
The rail holds fuel at pressure and the ECU fires the solenoid, so the needle lifts for a controlled window. On a Weichai engine the control valve opens, the nozzle sprays, and the ECU trims each cylinder individually. A worn unit shows up as a weak cone or a seeping seat long before it stops running.
Common rail injector vs nozzle
Comparing the complete injector with its nozzle is really whole unit vs component. The injector is the complete assembly; the nozzle — DLLA147P2474 here — is one serviceable part inside it. A CRIN2-16 vs CRI injector comparison is different again: the CRIN2-16 is a heavy-duty 16 mm-body injector, while a light-duty CRI unit is a smaller passenger-car part with a different calibration.
Internally the unit carries the Bosch F00RJ01727 control valve, the F00RJ04262 repair kit and the DLLA147P2474 (0433172474) nozzle. It is built to the CRIN2-16 high-pressure class, with Euro IV / Euro V emission compliance, and supplied new under the Vidishi Auto brand as a compatible replacement.
Technical Specifications
Verified parameters for this 1800 bar common rail injector (CRIN2-16 class), graded at the Euro IV V common rail injector platform level. Items the manufacturer does not publish are flagged, not guessed.
- Confirmed — multi-source verified fact
- Reference — interchange or class-level value; cross-check before relying on it
- Not published — the manufacturer does not publish it, and we never invent a number to fill the gap
| Parameter | Value | Data tier |
|---|---|---|
| Part number | 0445120391 (Bosch 0 445 120 391) | Confirmed |
| Weichai OE number | 612630090055 | Confirmed |
| Injector family | Bosch CRIN2-16 | Confirmed |
| Supplied brand | Vidishi Auto — new compatible replacement, not Bosch-branded | Confirmed |
| Injection system | Common Rail (CR) | Confirmed |
| Max injection pressure | up to 1800 bar (CRIN2-16 class rating) | Reference |
| DLLA147P2474 nozzle (inside) | DLLA147P2474 (Bosch 0433172474), 7-hole / 147° — component-level | Reference |
| F00RJ01727 control valve (inside) | F00RJ01727 | Reference |
| F00RJ04262 repair kit (inside) | F00RJ04262 | Reference |
| Application engine | Weichai WP10 / WP12 / WP13 / WD10 / WD615 | Confirmed |
| Emission | Euro IV / Euro V | Reference |
| Condition | New | Confirmed |
| Warranty | 12 months against manufacturing defects | Confirmed |
| Single package size | 28 × 12 × 12 cm | Confirmed |
| Packaged shipping weight | 1.5 kg per unit — packaging and transport weight | Confirmed |
| Net weight (single injector) | Not published by the manufacturer | Not published |
| Flow rate (cc/min) | Not published by the manufacturer | Not published |
| Coil resistance (ohm) | Not published by the manufacturer | Not published |
| Per-unit opening pressure | Not published by the manufacturer | Not published |
Reference figures come from the Weichai 612630090055 OEM reverse lookup and Bosch CRIN2-16 component evidence; the 0 445 120 391 number is carried on the body as an interchange, never as an origin claim. Net weight is left as not published because sources conflict (0.60 to 0.88 kg), so only the packaged shipping weight of 1.5 kg is stated. Pressure is a CRIN2-16 class rating, not a per-unit calibration value, and flow rate, coil resistance and opening pressure are quoted only after a bench test.
Cross-Reference & Interchanges
Need an 0445120391 cross reference or an 0445120391 equivalent? The Bosch CRIN2-16 interchange numbers below are the ones buyers match against. All are reference interchanges only.
Key Features
Why the 0445120391 CRIN2-16 unit is built for heavy-duty service.
CRIN2-16 high pressure injector
Rated to the CRIN2-16 common rail class, up to 1800 bar, for precise metering under load.
Complete unit, not a tip
The whole solenoid injector is supplied — a direct replacement for the Weichai WP-series engine.
Euro IV / V ready
Built for Euro IV / Euro V emission calibrations on Weichai heavy-duty diesels.
Serviceable internals
F00RJ01727 control valve, F00RJ04262 repair kit and DLLA147P2474 nozzle are available separately.
New and warranted
Supplied new with a 12-month warranty against manufacturing defects.
Compatible brand
Vidishi Auto compatible replacement — reference interchanges only, not genuine Bosch.
Failure Symptoms
Common rail injector symptoms to watch for on a Weichai heavy-duty engine, and the injector checks that separate a tired unit from a healthy one.
| Symptom | What it usually means |
|---|---|
| injector rough idle misfire | A weak or seeping unit drops combustion quality on one cylinder at idle and under load. |
| diesel injector black smoke | Poor atomisation from a worn spray pattern raises soot and exhaust opacity under load. |
| hard start injector | Low cranking compression on one cylinder or a leaking valve seat delays start-up. |
| high return flow injector | An internal leak raises return-line volume and starves the rail of pressure. |
| injector fault code | An ECU cylinder-balance or injector-circuit code points to one unit for a bench test. |
| common rail injector seat leak | A seeping needle seat loses rail pressure between injections and can coke the tip. |
| injector spray pattern weak | A worn cone shows an uneven, narrow spray rather than a clean fan on the tester. |
Two measurements do most of the work: an injector return flow test against the Bosch CRIN2-16 spec, and a bench spray and seat-leak check. The common rail injector failure causes are rarely the injector alone — contamination past the filter, a high-pressure pump shedding debris and worn valve seats from long service all repeat the same damage, so fix the root cause as well as the unit.
How to replace common rail injector on a Weichai engine
A bench-side walk-through of common rail injector installation for the 0445120391, from a single injector replacement Weichai fleets can do in the workshop to a full bench test.
Confirm the code
Match the etched 0445120391 / 0 445 120 391 and the engine code plate Weichai WP10 / WP12 / WP13 / WD10 / WD615 before removal.
Relieve pressure
Depressurise the common rail and isolate the battery before opening the fuel lines.
Remove and inspect
Unbolt the old unit, fit a fresh injector copper seal washer, and check the bore and seat for scoring or debris.
Fit to common rail injector torque
Seat the new 0445120391 to the clamp torque spec with a clean seal; never reuse a washer or over-torque the clamp.
Purge and code
Bleed air from the fuel line and write the injector coding value if the ECU generation requires it.
Bench-test
Run a bench test common rail injector check on spray pattern, seat leak and return flow before refitting.
Not sure how to test a common rail injector at home? A bench tester is the only reliable way to read opening pressure, cone shape and seat leak, and a road test will not separate a tired unit from a healthy one. Fit a fresh copper washer every time, torque to spec, and purge the line before the first start.
Warranty & Support
Every 0445120391 unit is covered against manufacturing defects, handled against the batch number on the box.
Manufacturing defects are covered from the ship date, and we handle an injector 12 month warranty against the batch number recorded on the box.
Contaminated fuel, water in the system, incorrect fitting, or a root fault elsewhere in the fuel system.
To open an injector warranty claim, send the batch number and the bench report; the full procedure sits on the Warranty Policy page.
Each unit is logged by batch so a claim is quick to verify and replace.
Wholesale & Bulk Supply
As a common rail injector supplier we ship to importers, workshops, fleets and injector rebuilders. Send a common rail injector RFQ for a wholesale common rail injector quote, from a single unit to a common rail injector bulk order.
Single units are supplied, and volume tiers are quoted on the same RFQ so you can test before a container.
Send the quantity and destination port and we return price, MOQ and lead time in one message, within 24 hours.
Sample batches and mixed SKU containers are quoted together, so a workshop can trial one family at a time.
Export documentation, packing list and HS code are provided with every consignment, with a tracking reference.
Shipping & Packing
Export packing and freight for single boxes through container volumes, quoted per order.
Express courier or air for single boxes and small batches, sea freight for container volumes, all with tracking.
Each unit ships in a 28 × 12 × 12 cm export box at 1.5 kg gross, foam-lined to protect the nozzle tip.
Commercial invoice, packing list, HS code documentation and a tracking reference travel with every consignment.
Buyer Feedback
Field notes from workshops and fleets running the 0445120391 on Weichai engines.
Matched the old 0 445 120 391 on our WP12 fleet; smooth idle and clean combustion after a bench-test. Compatible part, not an original Bosch unit — exactly what we needed for the price.
One unit replaced a tired injector on a WD615 generator; rail pressure restored and smoke dropped. Fast RFQ turnaround and the box arrived intact.
Frequently Asked
Common questions about the 0445120391 common rail injector and ordering a compatible replacement.
What is the 0445120391 common rail injector?
Is 0445120391 the same as Bosch 0 445 120 391?
Which engines does the 0445120391 injector fit?
Can you run an 0445120391 fitment check before I order?
What is the 0445120391 injection pressure?
Does the 0445120391 control valve come with the unit?
What about 0445120391 coding after fitment?
What are the 0445120391 warranty terms?
What is the 0445120391 minimum order quantity?
Is 0445120391 genuine Bosch?
Can I replace just one injector on a Weichai engine?
What is the Weichai OE number for this injector?
What causes a common rail injector to fail?
Do these injectors need coding after fitment?
How long is the lead time, and how is the order shipped?
What is a common rail injector?
Need Help Matching?
Send the engine nameplate and the old injector photo; we confirm the 0445120391 match before you pay.
Instant fitment check — wa.me/8613509025030
Formal quote — [email protected]
Warranty Policy — cover, claims and exclusions for the 0445120391.
Shipping Information — packing, freight modes and return rules.
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