0445120377 CRIN Injector for Bosch, Cummins 5307809
New 0445120377 common rail injector (Bosch CRIN-class reference, Cummins 5307809) for the Cummins ISL, ISLe, ISL8.9 and ISL9 8.9L heavy-duty diesel engines. A Vidishi Auto compatible replacement, Euro III / IV, 12-month warranty. Single package 25x20x15 cm / 1.0 kg gross. Wholesale export supply.
Original price was: $160.00.$85.00Current price is: $85.00.
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Product Specifications
| Weight | 1.0 kg |
|---|---|
| Dimensions | 25 × 20 × 15 cm |
| make | |
| model | |
| engine | Cummins ISL, Cummins ISL8.9, Cummins ISL9 8.9L, Cummins ISLe |
| position |
Product Details
0445120377 Common Rail Injector by the Numbers
Verified identity and fitment data for the complete diesel common rail injector, supplied for the Cummins heavy-duty range.
Each 0445120377 common rail injector is a complete heavy duty diesel injector for the high pressure common rail system rather than a bare spray tip: this CRIN-class injector carries the 0 445 120 377 reference on the body and serves the Cummins ISL, ISLe, ISL8.9 and ISL9 engines in trucks, machinery and generator sets.
Vehicle Compatibility for 0445120377
This complete injector runs the Cummins ISL, ISLe, ISL8.9 and ISL9 8.9L heavy-duty common rail diesel engines in DCEC trucks, construction machinery and generator sets. A Cummins common rail injector for the 8.9L platform.
| Engine | Displacement | Typical application | Injector |
|---|---|---|---|
| Cummins ISL | 8.9 L | Heavy-duty trucks, DCEC (Dongfeng Cummins) | 0445120377 |
| Cummins ISLe | 8.9 L | Euro IV trucks, construction machinery | 0445120377 |
| Cummins ISL8.9 | 8.9 L | DCEC trucks, generator sets | 0445120377 |
| Cummins ISL9 | 8.9 L | Heavy trucks, construction plant | 0445120377 |
Cummins ISLe injector8.9 L Euro IV
Cummins ISL8.9 injectorDCEC 8.9 L
Cummins ISL9 injectorHeavy trucks
Most buyers arrive with a Cummins engine injector number alone, so we keep the whole family in one place. Send the nameplate and we confirm whether the 0445120377 Cummins unit is the one you need; the same reference is also listed as a common rail injector for Cummins trucks and as a Cummins engine injector on the CRIN-class platform. Interchange numbers also seen across sources: 0445120389 and the Bosch 0 445 120 377 reference.
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 Cummins ISL, ISLe, ISL8.9 or ISL9, not another Cummins 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 0445120377 Injector
What the complete CRIN-class unit is, and how it sits in the Cummins 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 0445120377 is a complete common rail injector unit in the Bosch CRIN-class 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 Cummins 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 — DLLA146P2437 here — is one serviceable part inside it. A CRIN vs CRI injector comparison is different again: the CRIN-class 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 CRIN-class control valve and the DLLA146P2437 (0433172437) nozzle. It is built to the CRIN-class high-pressure common rail standard, with Euro III / Euro IV emission compliance, and supplied new under the Vidishi Auto brand as a compatible replacement. We describe this as a common rail injector complete unit vs nozzle so buyers know they receive the whole assembly.
Technical Specifications
Verified parameters for this CRIN-class high pressure injector, graded at the Euro III IV 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 | 0445120377 (Bosch 0 445 120 377) | Confirmed |
| Cummins OE number | 5307809 / C5307809 | Confirmed |
| Injector family | Bosch CRIN-class | Confirmed |
| Supplied brand | Vidishi Auto — new compatible replacement, not Bosch-branded | Confirmed |
| Injection system | Common Rail (CR) | Confirmed |
| Max injection pressure | CRIN-class high pressure (Reference class rating, not a single calibration) | Reference |
| DLLA146P2437 nozzle (inside) | DLLA146P2437 (Bosch 0433172437), 6-hole — component-level | Reference |
| Application engine | Cummins ISL, ISLe and ISL8.9 8.9L heavy-duty engines | Confirmed |
| Emission | Euro III / Euro IV | Reference |
| Condition | New | Confirmed |
| Warranty | 12 months against manufacturing defects | Confirmed |
| Single package size | 25 × 20 × 15 cm | Confirmed |
| Packaged shipping weight | 1.0 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 Cummins 5307809 / C5307809 OEM reverse lookup and Bosch CRIN-class component evidence; the 0 445 120 377 number is carried on the body as an interchange, never as an origin claim. Net weight is left as not published because sources conflict (0.55 to 1.5 kg), so only the packaged shipping weight of 1.0 kg is stated. Pressure is a CRIN-class high pressure 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 0445120377 cross reference or an 0445120377 equivalent? The Bosch CRIN-class interchange numbers below are the ones buyers match against. All are reference interchanges only.
Key Features
Why the 0445120377 CRIN-class unit is built for heavy-duty service.
CRIN-class high pressure injector
Rated to the CRIN-class common rail high-pressure standard for precise metering under load.
Complete unit, not a tip
The whole solenoid injector is supplied — a direct replacement for the Cummins ISL-series engine.
Euro III / IV ready
Built for Euro III / Euro IV emission calibrations on Cummins heavy-duty diesels.
Serviceable internals
DLLA146P2437 nozzle and the CRIN-class control valve 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 Cummins 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 CRIN-class 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. Recognising these common rail injector symptoms early prevents a roadside failure.
How to replace common rail injector on a Cummins engine
A bench-side walk-through of common rail injector installation for the 0445120377, from a single injector replacement Cummins fleets can do in the workshop to a full bench test.
Confirm the code
Match the etched 0445120377 / 0 445 120 377 and the engine code plate Cummins ISL, ISLe, ISL8.9 and ISL9 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 0445120377 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. The injector copper seal washer and the injector coding value are the two steps workshops most often skip.
Warranty & Support
Every 0445120377 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 25 × 20 × 15 cm export box at 1.0 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 0445120377 on Cummins engines.
Matched the old 0 445 120 377 on our ISLe 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 an ISL9 generator; rail pressure restored and smoke dropped. Fast RFQ turnaround and the box arrived intact.
Frequently Asked
Common questions about the 0445120377 common rail injector and ordering a compatible replacement.
What is the 0445120377 common rail injector?
Is 0445120377 the same as Bosch 0 445 120 377?
Which engines does the 0445120377 injector fit?
Can you run a 0445120377 fitment check before I order?
What is the 0445120377 injection pressure?
Does the 0445120377 control valve come with the unit?
What about 0445120377 coding after fitment?
What are the 0445120377 warranty terms?
What is the 0445120377 minimum order quantity?
Is 0445120377 genuine Bosch?
Can I replace just one injector on a Cummins engine?
How long is the lead time, and how is the order shipped?
Need Help Matching?
Send the engine nameplate and the old injector photo; we confirm the 0445120377 match before you pay.
Instant fitment check — wa.me/8613509025030
Formal quote — [email protected]
Warranty Policy — cover, claims and exclusions for the 0445120377.
Shipping Information — packing, freight modes and return rules.
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