No Products in the Cart
Cummins 4040240 is the large heavy duty turbocharger with a divided four bolt exhaust inlet flange, a V band turbine outlet and an aluminium compressor housing. It is used on Cummins QSK19, QSK38 and QSK50 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
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 4040240 |
| Engine | Cummins QSK19, QSK38, QSK50 |
| Fits | the Cummins QSK19, QSK38 and QSK50 diesel engines |
| 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 |
|---|---|
| 4040240(SPM-HEP-4910) | the Cummins QSK19, QSK38 and QSK50 diesel engines |
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 QSK19, QSK38 and QSK50 diesel engines. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| SINOCMP | USD 1,199.00 | 1 Nov 2026 |
| eBay (5 aftermarket sellers) | USD 1,379.99 to 1,686.35 | 1 Nov 2026 |
| Amoparts | USD 2,089.00 | 1 Nov 2026 |
| Fab Heavy | USD 2,103.36 | 1 Nov 2026 |
| KuduParts | USD 2,244.00 | 1 Nov 2026 |
| FridayParts | USD 2,382.45 | 1 Nov 2026 |
| Buy Machinery | USD 3,190.80 | 1 Nov 2026 |
| Spare Part Mart | USD 959.20 | Today |
Our price of USD 959.20 is 20% to 70% 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 was made for the Cummins QSK19, and 2 more listed under compatible equipment. Check the old turbocharger is marked 4040240 or one of the cross references, because makers change parts between serial ranges.
On the Cummins QSK19, 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.
Most failures come from oil starvation, dirty oil, or something passing through the wheels. Find the cause first: a blocked oil feed or dirty air path will kill the new turbocharger too.
A little radial play is normal on journal bearing turbos. Wheels touching the housing, or any noticeable end float, are not.
No. It is an aftermarket turbocharger made to replace the Cummins 4040240. 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.
Join and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that. Turn points into a discount whenever you like.
Opens the Marty Mates panel. No password: you enter your email, we send a code, and that is you in with your 200 points waiting. Joining signs you up to our emails and you can leave any time from the link in any of them. See our terms and conditions.
Member deals, specials before they go public, and easy ways to stack up points. Plus a nudge when a part you bought is due, so you are not caught out mid job.
You can leave any time from the link in any email we send. See our terms and conditions.
We will only bother you when it is worth it: a member deal, a specials drop, a way to earn points faster, or a heads up that a part you bought is due.
Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
No password: you enter your email, we send a code, and that is you in.
