4039921 HX40W Turbocharger Replacement for Cummins ISC Engines

This 4039921 HX40W turbocharger is an aftermarket replacement unit designed for Cummins ISC engines in medium-duty trucks and buses. It serves as a reference application for Freightliner, Ford, and Blue Bird vehicles, with OEM reference numbers 4039920 and 4089932 available to help confirm fitment before ordering.

Key Specifications

• Part Number: 4039921
• Product Type: Turbocharger
• Turbo Model: HX40W
• OEM Reference Numbers: 4039920, 4089932
• Packing Dimensions: 26 x 30 x 33 cm
• Gross Weight: 16 kg
• Application Clues: Cummins ISC engines in medium-duty trucks and buses
• Image Availability: Not available for this listing

Use the part number 4039921 and HX40W model designation to identify this unit. Cross-reference the supplied OEM numbers 4039920 and 4089932 against your existing turbocharger or service manual to help confirm fitment. Verify the specific Cummins ISC engine code and vehicle application before placing an order.

Application & Compatibility

Source application path clues for buyer verification. These are source category/application paths, not confirmed fitment claims:

• Freightliner > CUMMINS ISC
• Blue Bird > CUMMINS ISC
• FORD > CUMMINS ISC
• Kenworth > T300; T370 > T300; T370 Medium-duty truck > CUMMINS ISC
• Thomas Built Buses > Saf-T-Liner HDX; Saf-T-Liner MVP EF; Saf-T-Liner MVP ER > Saf-T-Liner HDX; Saf-T-Liner MVP EF; Saf-T-Liner MVP ER School bus > CUMMINS ISC
• VOLKSWAGEN > CUMMINS ISC

This HX40W turbocharger is listed for Cummins ISC engine applications in medium-duty trucks and buses. Reference applications include Freightliner, Ford, Blue Bird, Kenworth T300/T370, Thomas Built Buses, and Volkswagen. Use OEM reference numbers 4039920 and 4089932 to help confirm fitment for your specific vehicle and engine code. Verify the existing turbocharger configuration, mounting orientation, and exhaust inlet details before ordering. For fleet or bus operations, cross-check the production year and engine variant to ensure the HX40W unit matches your current setup. Technical fitment support is available to assist with verification.

Technical Notes

The HX40W turbocharger is a medium-duty unit associated with Cummins ISC engine applications. Technical verification should focus on the specific engine variant and existing turbocharger configuration. Buyers should confirm the mounting orientation, exhaust inlet details, and any actuator or cooling differences before installation. reference checking OEM numbers 4039920 and 4089932 helps identify the correct replacement application. For fleet or bus operations, verify the production year and engine code to ensure the HX40W setup matches your current system. Technical fitment support is available to assist with these verification steps.

B2B Supply

LeadTurbo supports B2B buyers with volume pricing and worldwide shipping for the 4039921 HX40W turbocharger. Technical fitment support is available to help verify engine codes, OEM reference numbers 4039920 and 4089932, and mounting detailss before ordering. This service assists repair shops, distributors, and fleet parts buyers in confirming that the replacement unit matches their specific Cummins ISC application. Contact our team for bulk order details and pre-shipment inspection options.