The 2.5-liter Mitsubishi 4D56 diesel engine was assembled by the concern from 1986 to 2016 and was installed on Pajero and Pajero Sport SUVs, L200 pickups and Delica minibuses. This power unit served as the basis for the well-known Hyundai D4BA, D4BF and D4BH diesel engines.

The 4D56 engine was developed in 1986 by the Japanese automobile company Mitsubishi. After that, for 10 years, Japanese engineers were finalizing it. The main task for the designers was to increase the power and service life, to ensure normal maintainability.