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Aftermarket replacement fuel injector for Cummins 4BT and 6BT engines. It replaces Cummins part number 3919343: the fuel injector listed by Cummins as part number 3919343.
Fits Cummins 4BT and 6BT engines. It is built to the same mounting, wiring and connector layout as the part it replaces, so it fits in place of the old one without changes to the machine.
Check the part number on the label of the old unit, or in the parts manual for your machine's serial number range, before ordering. Sold as a single unit, shipped worldwide.
| Part Type | Fuel Injector |
| Replaces | Cummins 3919343 |
| Fits | Cummins 4BT and 6BT engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 840999 |
Cummins machines and engines
Check the part number on your old unit before ordering.
| Pack | Cummins Part No.(SPM Part No.) | Fits |
|---|---|---|
| 1 Piece | 3919343(SPM-HEP-2460) | Cummins 4BT and 6BT engines |
Rough running and misfire
A worn or sticking injector sprays unevenly: the engine knocks, misfires or idles rough. A cylinder cut-out test finds the bad one.
Smoke and fuel use
Black smoke and rising fuel use point to dribbling nozzles. Replace injectors before they wash the cylinder walls.
Hard starting
Leaking injectors bleed fuel pressure back and make the engine crank longer, especially when hot.
Fitting tips
Fit new copper washers and seals, clean the seat in the head, and torque the clamp to the engine maker's figure.
Found this part cheaper elsewhere? Send us the listing and we will beat it under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Our price of USD 26.40 is approximately 20% less than the aftermarket prices we compared it with:
| eBay, aftermarket seller | USD 33.00 (checked 5 Oct 2026) |
| eBay, aftermarket seller | USD 33.00 (checked 5 Oct 2026) |
| eBay, aftermarket seller | USD 33.00 (checked 5 Oct 2026) |
No. It is an aftermarket part made to fit in place of Cummins 3919343. It is not made by or affiliated with Cummins; the Cummins part number is used only to show what it replaces.
It fits Cummins 4BT and 6BT engines. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
