Product Specifications:
Engineered to conquer extreme payloads and relentless towing demands, the 0445120018 is a heavy-duty aftermarket Common Rail Diesel Fuel Injector meticulously calibrated for the legendary 2002-2004 Dodge Ram 5.9L (ETC/ETH) 6-cylinder powerplants. Functioning as the core fuel delivery system for rugged Ram 2500, 3500, and 4×4 pickup trucks, this high-flow component perfectly restores original factory atomization. Replacing your degraded injectors with this premium unit instantly eliminates violent cold start shaking, slashes heavy white or black exhaust smoke, and safely recovers the massive 218-329 BHP hauling power your rig requires. Designed as a seamless mechanical drop-in, it guarantees true plug-and-play installation with zero complex ECU programming, getting your truck out of the shop and back to the job site without expensive dealership intervention.
📊 Part Number Cross Reference
(Data verified via global catalog search – Extensive Interchangeability)
| Manufacturer Ref (Bosch Style) | Original Equipment (Cummins / Mopar) |
| 0445120018 | 3947550 / 3949619 / 4940589 / 5254686 |
| 0445120113 / 0445120210 | 5263318 |
| 0445120255 / 0986435503 | [Alternative Replacements] |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Model / Application | Engine Size | Year | Engine Code & Specs |
| Dodge | Ram 2500, 3500, Pickup, 4×4 | 5.9 d | 2002-2004 | ETC, ETH (218-329 BHP) |
👨🔧 Tech Notes & Installation Guide
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💰 Why Replace the Full Set?
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The Risk: Leaving a single degraded injector in a high-mileage 6-cylinder 5.9L block causes massive cylinder pressure imbalances. This inevitably leads to severe engine knocking, premature piston melting, and a highly dangerous loss of hauling torque when dragging heavy trailers uphill.
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The Fix: We strictly advise utilizing our Volume Discounts to install a perfectly synchronized set of 6 units. This guarantees balanced combustion, returning your truck to a smooth, reliable idle and restoring its maximum factory towing rating.
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✅ Direct Replacement (No Coding Required):
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Rigorously flow-tested on advanced DCI benches, this unit delivers true plug-and-play functionality. It requires zero IMA programming, bypassing expensive diagnostic tools and saving your mechanic hours of labor.
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⚠️ Critical Cleaning Step:
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Heavy-duty diesel fuel rails are extremely sensitive to microscopic metallic debris. You absolutely must flush the entire high-pressure fuel system before installation. Always equip a brand-new 5-micron fuel filter to protect the precision nozzle from instant destruction.
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🔍 Explore More Heavy Duty Parts:
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⚖️ Legal Disclaimer
Part numbers, OE numbers, and brand names mentioned above are for reference and identification purposes only. This product is a compatible aftermarket replacement part and is NOT manufactured, sponsored, or affiliated with the original equipment manufacturers.
