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4089336 HX40W Turbocharger Replacement for Cummins ISL8.9

4089336 HX40W turbocharger for Cummins ISL8.9 engines. Aftermarket replacement application for Orion VII, Blue Bird M380, and Sterling M8500. Verify part number and engine code before ordering.

Orders without stock ship approximately 60 days after ordering. Estimated ship date if ordered today: .

Type Turbocharger On backorder — orders accepted Part # 4089336 Models HX40W Weight 16.00 kg Packing 26*30*33
Cross Reference 3597602
Show more cross references 3597602 3597603
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12-Month Warranty Shipping to Canada only. OEM-Grade Quality

The 4089336 HX40W turbocharger is an aftermarket replacement unit designed for Cummins ISL8.9 engines in Orion VII transit buses, Blue Bird M380 motorcoaches, and Sterling M8500 medium-duty trucks. This complete turbo assembly serves as an aftermarket replacement application for units associated with OEM reference numbers 3597602 and 3597603, supporting fleet maintenance and repair operations.

Key Specifications

  • Part Number: 4089336
  • Product Type: Turbocharger
  • Turbo Model: HX40W
  • Packing Dimensions: 26*30*33 cm
  • Gross Weight: 16 kg
  • Representative OEM Reference Numbers: 3597602, 3597603

These specifications support initial identification and logistics planning. Buyers should cross-check the part number and OEM references against their specific Cummins ISL8.9 engine variant to confirm the correct replacement unit before placing an order.

Application & Compatibility

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

  • Orion Bus > Orion VII > Orion VII Transit bus > CUMMINS ISL8.9
  • Blue Bird > M380 > M380 Motorcoach > Motorhome > CUMMINS ISL8.9
  • Sterling > M7500 > M8500 > M8500 Medium-duty truck > CUMMINS ISL8.9

This HX40W turbocharger is listed for Cummins ISL8.9 applications in Orion VII transit buses, Blue Bird M380 motorcoaches, and Sterling M8500 medium-duty trucks. These vehicle and engine clues serve as reference points for initial identification. Buyers should verify the specific part number 4089336, engine code, and production year against their records. Cross-checking OEM reference numbers 3597602 and 3597603 helps confirm the correct replacement application. Verify all fitment details before ordering to ensure the unit matches your specific fleet requirements.

Technical Notes

The HX40W turbocharger is a complete assembly for Cummins ISL8.9 engines. Typical configuration may include VNT design and an oil-cooled system; verify per application. Buyers should confirm the specific turbo configuration and actuator type against their records. Cross-reference OEM numbers 3597602 and 3597603 to ensure the unit matches the original equipment requirements for your specific vehicle model.

B2B Supply

LeadTurbo supports B2B buyers with volume pricing and worldwide shipping for the 4089336 HX40W turbocharger. Technical fitment support is available to help verify part number, Cummins ISL8.9 engine code, and OEM reference numbers 3597602 or 3597603 before ordering. Contact our team for bulk quotes or logistics details regarding the 16 kg gross weight and 26*30*33 cm packing dimensions.

Product FAQ

The 4089336 HX40W turbocharger is associated with OEM reference numbers 3597602 and 3597603. Verify these references against your specific Cummins ISL8.9 application before ordering.

Inspect the VNT vane mechanism for smooth, unrestricted movement before installation. Ensure no debris or damage impedes vane rotation, as this affects turbocharger performance and stability.

Cross-reference the compressor wheel dimensions with the OEM specification for your specific Cummins ISL8.9 engine variant. Confirm inducer and exducer diameters match the original equipment requirements.

This turbocharger is referenced for Orion VII Transit buses, Blue Bird M380 Motorcoaches, and Sterling M8500 Medium-duty trucks. Verify your specific vehicle model and production year before ordering.

Orion VII 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 Orion VII.

Compatibility Verify part number 4089336, Cummins ISL8.9 engine code, vehicle application (Orion VII, Blue Bird M380, Sterling M8500), and OEM reference numbers 3597602 or 3597603 before ordering. Confirm turbo configuration and production year for fitment accuracy.

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Frequently Asked Questions

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Turbochargers

Complete Turbo Units

Complete turbo units designed for rigorous heavy-duty use where OEM units may fall short.

CHRA Core

CHRA / Core Assemblies

Brand-new compatible CHRA cores — like-new performance at a fraction of replacement cost.

Turbine Wheel

Turbine Wheels & Shafts

Precision-balanced turbine shafts engineered from inside out for superior durability.

Turbine Housing

Turbine Housings

Silicon-molybdenum (Si-Mo) nodular cast iron — engineered for extreme heat resistance.

Compressor Housing

Compressor Housings

OEM-matched geometry and surface finish — advanced casting and machining for perfect fitment.

Bearing Housing

Bearing Housings

Rock-solid platform engineered for high-output rebuilds — the foundation for performance.

Compressor Wheels

Compressor Wheels

Aluminum, stainless steel, or titanium alloys — precision machined for superior responsiveness.

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