[1][2][3] Although the basic designs of the various engines are the same, their exact specifications are individually tailored for each partner (Chrysler, Mitsubishi, and Hyundai).

The intake and exhaust cam timing is continuously independently controlled and provide four optimized engine operating modes.

To lower vibration, Mitsubishi used a 4-point inertial axis system with cylindrical hydraulic engine mounts on the left and right sides.

A custom-tuned insulator was developed for the front and rear mounts to help control both idle vibration and acceleration shock.

[8] The MIVEC VVT system is only applied on the intake side, a balancer shaft derived from the 4B12 is adopted (in place of the standard oil pump), a linear Air/Fuel sensor fitted in place of the Oxygen sensor of front intake, unsymmetrical piston skirts, different pattern piston skirt resin coating & a unique resin coating crank shaft bearing is used.

The PHEV 4B11 is restricted to a maximum operating speed of 4500 rpm to prevent damage to the electrical motors & generator from overspeeding.

[10] A semi-closed deck structure, an integrated ladder frame and four-bolt main bearing caps contribute to engine strength, durability, and lower NVH levels.

Mitsubishi lowered the friction of the engine by including elastic grinding of the valve stems, adopting a high-efficiency shroud equipped plastic impeller in the water pump and using 0W-20 low-viscosity oil.