Most 2018 International 4300 trucks were equipped with a Cummins ISB 6.7-liter turbo diesel engine, though exact powerplant options could vary by build and market.
The 4300 is a versatile medium-duty truck from International (Navistar) and offered several diesel engine options over its production run. For 2018 models specifically, the dominant engine was the Cummins ISB 6.7L, while older or region-specific builds sometimes used Navistar’s prior MaxxForce offerings. Always verify the specific build sheet for a given vehicle.
Engine options for the 2018 International 4300
Below are the engines that could appear in 2018 4300 configurations. Availability depends on the truck’s chassis, GVWR, and regional market.
- Cummins ISB 6.7L turbo diesel — the standard and most common engine for 2018 4300s, offering reliable performance and strong torque for medium-duty applications.
- Navistar MaxxForce 7 6.4L V8 diesel — a legacy option found on some older or special-build units; less common on late-2010s production as Navistar transitioned engines toward Cummins in many markets.
- Older generation options such as the Cummins ISB 5.9L — generally found only on leftover inventory or niche builds; not a primary offering for most 2018 models.
Check the truck’s build sheet or VIN to confirm the exact engine on any given 2018 International 4300.
How to verify the engine in your 2018 4300
For accuracy, inspect the manufacturer’s data plate, VIN, or the original window sticker. The VIN can be decoded to reveal the engine family, or the build sheet (sometimes called a RAS or status sheet) will list the exact powertrain installed at factory. If in doubt, contact a Navistar/International dealer with the VIN for confirmation.
Summary
The 2018 International 4300 primarily used the Cummins ISB 6.7L turbo diesel, with occasional legacy MaxxForce 7 6.4L or older ISB options on certain builds. Engine availability varies by configuration and market, so verify the exact powerplant on the specific vehicle you’re evaluating.