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Cummins 4089393 is the Holset HX40W type wastegated turbocharger with the actuator and boost hose fitted, a twin entry (divided) four bolt exhaust inlet flange, an aluminium compressor housing and a cast iron turbine housing. It is used on Cummins 6C8.3 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as Cummins 3598070, 3598500 and 3598071.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Turbocharger |
| Replaces | Cummins 4089393 |
| Turbo model | HX40W |
| Engine | Cummins 6C8.3 (6CTA8.3) |
| Turbine inlet | Twin entry, four bolt flange |
| Wastegate | Yes, actuator fitted |
| Cross references | Cummins 3598070, 3598500, 3598071 |
| Fits | the Cummins 6C8.3 (6CTA8.3) diesel engine |
| Condition | New, aftermarket |
| Stat. HS-Code | 841480 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Cummins Part No.(SPM Part No.) | Fits |
|---|---|
| 4089393(SPM-HEP-4769) | the Cummins 6C8.3 (6CTA8.3) diesel engine |
| 3598070(SPM-HEP-4769) | the Cummins 6C8.3 (6CTA8.3) diesel engine |
| 3598500(SPM-HEP-4769) | the Cummins 6C8.3 (6CTA8.3) diesel engine |
| 3598071(SPM-HEP-4769) | the Cummins 6C8.3 (6CTA8.3) diesel engine |
What it does
Exhaust gas spins the turbine, which drives the compressor wheel on the same shaft and pushes more air into the engine. More air lets the engine burn more fuel cleanly, giving the rated power.
Where it is used
Made for the Cummins 6C8.3 (6CTA8.3) diesel engine.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| 4BTdiesel | USD 338.89 | 1 Nov 2026 |
| eBay (8 aftermarket sellers) | USD 344.68 to 1,173.68 | 1 Nov 2026 |
| FridayParts | USD 404.36 | 1 Nov 2026 |
| SINOCMP | USD 599.00 | 1 Nov 2026 |
| Spare Part Mart | USD 312.00 | Today |
Our price of USD 312.00 is 8% to 73% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it is a direct replacement for the Cummins 4089393 with the same fitting.
Often as long as the engine, 8,000 hours or more, when the oil and air filters are kept on schedule. Most turbos fail early from oil or dirt problems, not age.
Blue or black smoke, a whistle or siren noise, loss of power, oil in the intake or exhaust, or the shaft rubbing the housing.
A little radial play is normal on journal bearing turbos. Wheels touching the housing, or any noticeable end float, are not.
Yes. Fit new oil and a new filter, and replace the oil feed and drain gaskets. Make sure the drain line is clear and runs downhill.
No. It is an aftermarket turbocharger made to replace the Cummins 4089393. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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