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Bosch
0445120177 Bosch CRIN Fuel Injector for Cummins QSB & ISB 6.7L Diesel Engines
0445120177 Bosch CRIN Fuel Injector for Cummins QSB & ISB 6.7L Diesel Engines
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Genuine new Bosch 0445120177 CRIN electromagnetic common rail fuel injector for Cummins QSB 4.5L, 5.9L and 6.7L and ISB 6.7L diesel engines. This OEM Bosch injector, also referenced as 5254261, is engineered for precise fuel metering, stable rail-pressure response, reliable cold starting and long service life in agricultural, construction, marine, industrial and on-highway diesel applications.
This injector is compatible with a wide range of Cummins QSB4.5, QSB5.9 and QSB6.7 / ISB6.7 engines used in trucks, buses, tractors and industrial machinery. Always confirm compatibility by Bosch number, OE number, VIN, engine serial number, or the identification number marked on the original injector before ordering.
This is a brand-new genuine Bosch component supplied in original Bosch packaging. It is not IMA coded, so no injector coding or programming is required after installation. Supplied as a single piece (1 injector).
Also known internationally as: Einspritzdüse / Injektor (DE), injecteur (FR), iniettore (IT), inyector (ES), injector (RO) — Bosch 0445120177 common rail injector for Cummins 6.7L.
Buying for a full 6-cylinder engine? See the Bosch 0445120177 injector set of 6 for Cummins QSB / ISB 6.7L.
Key Features
| Feature | Details |
|---|---|
| Product type | Bosch CRIN common rail electromagnetic fuel injector |
| Brand | Genuine Bosch |
| Fuel system | Bosch common rail diesel injection system |
| Application | Pickup trucks, medium-duty trucks, buses, agricultural, construction, marine, industrial and power-generation diesel engines |
| Engine compatibility | Cummins QSB4.5, QSB5.9, QSB6.7 / ISB6.7 diesel engines |
| Actuator type | Electromagnetic solenoid |
| Fuel type | Diesel |
| Coding | Not IMA coded — no programming required |
| Fitment type | Direct OEM replacement when part numbers match |
| Quality standard | Bosch OEM manufacturer quality |
| Installation | Professional installation recommended |
Product Details
| Product detail | Information |
|---|---|
| Main Bosch part number | 0445120177 |
| Bosch exchange (reman) equivalents | 0986435697, 0986435705 |
| Bosch injector family | CRIN3-18 |
| Product category | Common rail diesel fuel injector |
| Manufacturer | Bosch |
| Condition | Brand-new genuine Bosch OEM component supplied in original manufacturer packaging |
| Coding | Not IMA coded |
| Made in | Brazil |
| EAN / GTIN | 4047024785007 |
| Included in package | Fuel injector (1 piece) |
| Weight | 0.70 kg |
| Package dimensions | 30 x 10 x 10 cm |
| Installation area | Engine cylinder head |
Cross-Reference Numbers
Compare your original part number before ordering. Vehicle model alone is not enough for compatibility confirmation.
| Brand / manufacturer | Cross-reference numbers |
|---|---|
| Bosch (new) | 0445120177, 0 445 120 177, CRIN3-18 |
| Bosch exchange / reman | 0986435697, 0 986 435 697, 0986435705, 0 986 435 705 |
| Cummins | 5254261, 5 254 261, 52542610, 5254261006R, 525426100QX, 5254261NX, 5254261PX, 5254261QX, 5254261RX, 5579332, 5579332NX, 5579332RX, 3060303, 3060479, 3060481 |
| Komatsu | 2411300035, 241-130-0035, 2411301035, 241-130-1035, 2411306035, 241-130-6035, 6755113100, R6755113100, R6755-11-3100 |
Vehicle Compatibility
Compatibility must always be verified by original Bosch part number, OEM reference number, VIN number, engine serial number, or injector identification number.
Cummins Engine Applications
| Make | Engine | Displacement | Power (kW) | Year | Engine code |
|---|---|---|---|---|---|
| Cummins | QSB4.5 | 4.5 L | 60.0 – 125.0 | 09/2002 → | QSB4.5 |
| Cummins | QSB4.5 | 4.5 L | 89.0 – 127.0 | 09/2013 → | QSB4.5 |
| Cummins | QSB5.9 | 5.9 L | — | 09/2001 → | QSB5.9 |
| Cummins | QSB6.7 | 6.7 L | 98.0 – 202.0 | 09/2006 → | QSB6.7 |
| Cummins | QSB6.7 | 6.7 L | 103.0 – 221.0 | 09/2013 → | QSB6.7 |
Truck Applications
| Make | Model | Displacement | Power (kW) | Year | Engine code |
|---|---|---|---|---|---|
| International (Navistar) | DuraStar 4300LP 6.7 | 6.7 L | — | 09/2014 – 08/2019 | ISB |
| Peterbilt | 337 | 6.7 L | — | 09/2013 – 08/2023 | PX-7 (PX-7.164) |
Additional applications: the same Bosch 0445120177 / 5254261 injector is also fitted to other machines running the Cummins QSB 4.5L / 6.7L and ISB 6.7L engine, including Dodge Ram 2500 and 3500 pickups with the 6.7L Cummins engine, Freightliner M2 medium-duty trucks, Thomas school buses, Cummins generator sets, and industrial and construction equipment such as Hyundai and Komatsu wheel loaders and excavators. Exact model years vary.
Always confirm fitment using your original part number before ordering.
Technical Information
| Technical specification | Information |
|---|---|
| Injector type | CRIN3-18 electromagnetic common rail fuel injector |
| Actuator technology | Electromagnetic solenoid |
| Fuel system type | Bosch common rail diesel injection system |
| Coding | Not IMA coded — no injector coding needed |
| Application type | Pickup trucks, medium-duty trucks, buses, agricultural, construction, marine, industrial and power-generation diesel engines |
| Installation type | Direct OEM replacement |
| Compatibility verification | Bosch number, OE number, VIN, or engine code required |
Related Diesel Fuel System Parts
The following related diesel fuel system components may be used together with this application depending on engine configuration. This list is not exhaustive — other part numbers that are not shown here may also be compatible. Always confirm the correct part by the code marked on the component actually fitted to your engine.
| Product type | Product codes | Engine |
|---|---|---|
| Inlet connector (injector) | F00RC00647, F00RJ01831; CASE: 84403334; Cummins: 4929864, 5346206; Komatsu: 4929864; Mopar: 68441874AA | QSB4.5 · QSB5.9 · QSB6.7 |
| High-pressure pump, CR system | 0445020109, 0986437375, CR/CP3HS3/L110/30-789S; Cummins: 4989266; Komatsu: 4989266, 6754721012 | QSB4.5 · QSB5.9 · QSB6.7 |
| High-pressure pump, CR system | 0445020176, CR/CP3HS3/L110/30-789S; Cummins: 5252703, 5262703; Komatsu: 5262703 | QSB4.5 · QSB6.7 |
| High-pressure pump, CR system | 0445020609, CR/CP4N2/L93/40-S; Cummins: 5302736, 5529762 | QSB4.5 (89–127 kW / 09/2013→) · QSB6.7 |
Compatibility Note
Please verify your original Bosch number, OEM reference number, VIN number, engine serial number, or injector identification number before purchase. Do not install the part before checking compatibility. Installed or used fuel system parts may not be eligible for return.
Shipping and Warranty
| Shipping / warranty detail | Information |
|---|---|
| Shipping | Same-day handling for stock items |
| Pre-order availability | Pre-order items may require 2-4 weeks handling time |
| Warranty | 1-year manufacturer global warranty covering manufacturing defects |
| Returns | Returns accepted only for unused and uninstalled parts in original condition |
| Fitment responsibility | Buyer must verify compatibility before installation |
| Installation damage | Damage caused by incorrect installation, contaminated fuel, or incorrect application is not covered |
FAQ
| Question | Answer |
|---|---|
| Is this a genuine Bosch fuel injector? | Yes. This is a genuine new Bosch OEM common rail diesel fuel injector, supplied in original Bosch packaging and made in Brazil. |
| What is the main Bosch part number? | The main Bosch reference for this new injector is 0445120177; the common Cummins reference is 5254261. 0986435697 and 0986435705 are the Bosch exchange (reman) equivalents for the same application. |
| Which engines use Bosch 0445120177? | It is used in Cummins QSB4.5, QSB5.9, QSB6.7 and ISB6.7 6.7L diesel engines fitted to trucks, buses, tractors and industrial machinery. |
| Is this injector IMA coded? | No. This injector is not IMA coded, so no injector coding or programming is required after fitting. |
| Is this new or remanufactured? | This is a brand-new genuine Bosch injector. |
| What type of injector is the Bosch 0445120177? | It is an electromagnetic solenoid common rail fuel injector belonging to the Bosch CRIN3-18 family. |
| Is professional installation recommended? | Yes. Professional installation is recommended to ensure correct fitment, proper torque settings, and system integrity checks before and after replacement. |
| What causes common rail injector failure? | Common causes include fuel contamination, water in fuel, metal particle contamination from a failed high-pressure pump, insufficient fuel filtration, and wear from extended service. |
| Can a failed injector damage other fuel system components? | Yes. A failed injector may cause hard starting, misfiring and increased fuel consumption. If the failure is linked to system contamination, the rail, pump, lines and filter housing may also be affected. |
Diagnostic Information
Common Symptoms of Fuel Injector Failure
Hard starting, long cranking, engine no-start condition, unstable idle, engine misfiring, loss of power, rough running, excessive smoke, abnormal fuel consumption, check engine warning light, or visible fuel system contamination may indicate problems within the diesel fuel system or common rail injection system.
These symptoms may also be caused by the high-pressure fuel pump, rail pressure sensor, fuel metering valve, ECU faults, fuel contamination, or other diesel engine management issues.
Installation and System Check
Before replacing a common rail fuel injector, a professional diagnostic inspection should be performed, including rail pressure testing, injector leak-off testing, fuel contamination inspection, ECU fault-code analysis, fuel filter inspection, and diesel fuel quality inspection.
If the previous injector failed internally, or if the high-pressure pump failed and released metal particles into the fuel system, the common rail, fuel lines, fuel filter housing, injector connector tubes and other injectors should also be inspected and cleaned or replaced if necessary. Installing a new Bosch injector into a contaminated fuel system may result in immediate repeat failure.
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