Product Specifications:
Engineered to endure the relentless transit schedules of urban bus routes and demanding highway freight logistics, the 0445120081 is a heavy-duty aftermarket Common Rail Diesel Fuel Injector. Meticulously calibrated for the widely utilized FAW Xichai 4DF and 6DF commercial engines, this premium unit completely reinstates factory-grade fuel atomization and highly stable rail pressure.
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Restores Highway Merging Power: Cures sluggish acceleration and brings back the essential high-speed torque required to keep fully loaded commercial trucks and passenger buses strictly on schedule.
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Eliminates Heavy Black Smoke: Instantly resolves erratic engine idling and unburnt fuel issues, protecting your fleet’s exhaust aftertreatment systems from premature DPF soot clogging.
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True Plug & Play Installation: Manufactured as a direct mechanical drop-in, this precision component requires absolutely zero complex ECU coding, getting your commercial vehicles out of the repair shop rapidly.
📊 Part Number Cross Reference
(Data verified via global catalog search – Extensive Interchangeability)
| Manufacturer Ref (Bosch Style) | Original Equipment (FAW / Kinglong) |
| 0445120081 | 1112010B470-0000 / 1112010470 |
| 0445120331 / 00986AD1001 (Reman) | 30614068832 |
🚛 Fits Applications (Engine & Vehicle)
(Verified application list)
| Make | Model / Application | Engine Size | Year | Engine Code & Specs |
| FAW | Commercial Trucks / Transport Vehicles | – | Various | 4DF, 6DF, CA4DF, CA6DF |
| Kinglong | Commercial Passenger Buses | – | Various | Xichai Engine Series |
👨🔧 Tech Notes & Installation Guide
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💰 Why is replacing the full set highly recommended?
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The Risk: Leaving an aging or clogged injector in a hard-working commercial engine block creates massive fuel rail pressure drops. This directly results in violent cabin vibrations at highway speeds, significantly increased fuel consumption, and a highly dangerous loss of uphill pulling power when fully loaded.
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The Fix: We strongly advise leveraging our Volume Discounts to install a completely synchronized set of 4 or 6 units (depending on your specific 4DF/6DF engine block). This ensures perfectly balanced cylinder firing, returning your transport vehicle to a whisper-quiet idle and recovering its maximum factory payload rating.
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✅ Do I need to program this injector after installation?
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No. Direct Replacement: Rigorously flow-tested on advanced DCI calibration benches, this unit delivers true plug-and-play functionality. It requires zero IMA programming, bypassing expensive dealership diagnostic tools and slashing your fleet mechanic’s labor downtime.
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⚠️ What are the critical pre-installation cleaning steps?
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Mandatory System Flush: Commercial fleet fuel tanks inevitably accumulate heavy sludge and metallic micro-debris over millions of miles. Failure to thoroughly flush the entire high-pressure fuel rail and install a brand-new OE-quality 5-micron fuel filter will cause instant contamination damage and strictly void the 30-day manufacturing defect policy.
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🔍 Explore More Heavy Duty Parts:
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Looking for more options? Browse our complete selection of Fuel Injectors & Pumps.
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Keep your fleet running smoothly with our premium Engine Components.
⚖️ 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.
