4039903 HX25 Turbocharger Replacement for NEF Engines
4039903 HX25 turbocharger for IVECO NEF and KOMATSU NEF applications. Aftermarket replacement referencing OEM 4039904. Verify engine and vehicle fitment before ordering.
Orders without stock ship approximately 60 days after ordering. Estimated ship date if ordered today: .
The 4039903 HX25 turbocharger is an aftermarket replacement unit designed for NEF engine applications, including IVECO and KOMATSU vehicles. This complete turbo assembly references OEM number 4039904 and is listed for INTERNATIONAL-HARVESTER applications. Buyers should verify part number, engine code, and vehicle application against their specific unit before ordering to ensure correct fitment.
Key Specifications
- Part Number: 4039903
- Product Type: Turbocharger
- Turbo Model: HX25
- OEM Reference: 4039904
- Packing Dimensions: 21 x 23 x 26 cm
- Gross Weight: 8 kg
- Application Clues: INTERNATIONAL-HARVESTER, IVECO NEF, KOMATSU NEF
These specifications help buyers confirm the physical unit and packaging details before shipping. Verify the OEM reference 4039904 against your specific engine code to ensure the correct HX25 configuration is selected for your NEF application.
Application & Compatibility
Source application path clues for buyer verification. These are source category/application paths, not confirmed fitment claims:
- INTERNATIONAL-HARVESTER
- IVECO > NEF
- KOMATSU > NEF
This HX25 turbocharger is listed for INTERNATIONAL-HARVESTER, IVECO NEF, and KOMATSU NEF applications. These paths serve as reference clues for buyers to confirm the correct unit for their specific engine. Verify the part number 4039903 and OEM reference 4039904 against your vehicle's service manual or engine code before ordering. Confirm that the mounting flange, oil feed, and exhaust connections match your existing setup. Technical fitment support is available to assist with application verification.
Technical Notes
The HX25 turbocharger is a complete assembly designed for NEF engine applications. Buyers should verify the specific turbo configuration, including compressor housing and turbine housing details, against their engine code. Confirm that the oil feed, coolant, and exhaust connections match the existing setup. Check the shaft end play and radial play tolerances using a dial indicator to ensure the unit is within acceptable limits. Verify the compressor wheel nut tightening torque and thread direction per manufacturer specifications to prevent bearing damage. Inspect O-ring materials for compatibility with engine oil and coolant before installation. Technical fitment support is available to assist with these verification steps.
B2B Supply
LeadTurbo supports B2B buyers, repair shops, and distributors with volume pricing for the 4039903 HX25 turbocharger. Worldwide shipping is available for this 8 kg unit, packed in 21 x 23 x 26 cm dimensions. Technical fitment support is provided to verify OEM reference 4039904 and NEF engine applications. Confirm part number, vehicle, and engine code before ordering to ensure the correct replacement unit is selected.
Product FAQ
OTHER and other product, brand and model names are the property of their respective owners and are used for reference and application-lookup only. LeadTurbo is not affiliated with or endorsed by OTHER.
Compatibility Verify part number 4039903, engine code NEF, vehicle application, production year, and OEM reference 4039904 before ordering. Confirm turbo configuration and mounting details for your specific application.
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Complete Turbo Units
Complete turbo units designed for rigorous heavy-duty use where OEM units may fall short.
CHRA / Core Assemblies
Brand-new compatible CHRA cores — like-new performance at a fraction of replacement cost.
Turbine Wheels & Shafts
Precision-balanced turbine shafts engineered from inside out for superior durability.
Turbine Housings
Silicon-molybdenum (Si-Mo) nodular cast iron — engineered for extreme heat resistance.
Compressor Housings
OEM-matched geometry and surface finish — advanced casting and machining for perfect fitment.
Bearing Housings
Rock-solid platform engineered for high-output rebuilds — the foundation for performance.
Compressor Wheels
Aluminum, stainless steel, or titanium alloys — precision machined for superior responsiveness.
