The fourth-generation Mitsubishi L200 (KA0T and KB0T chassis codes) premiered in 2005. Featuring a distinct aerodynamic silhouette with a curved cab-to-bed transition line ('J-line'), it was manufactured in Thailand in Single Cab, Club Cab, and Double Cab versions. Engineering of the L200 IV (KA0T) (factory code KA0T) emphasized high structural rigidity, aerodynamic efficiency, and optimized interior spatial packaging. Built with reinforced body structures utilizing high-tensile steel alloys, the platform delivered reduced curb weight alongside improved occupant crash protection. The vehicle was distributed globally in multiple configuration packages designed to satisfy diverse market demands and regional regulatory specifications.

The core engine was a 2.5-liter 4D56 DI-D Common Rail turbodiesel outputting between 136 and 178 horsepower. A 3.5-liter V6 was offered in select markets. Highlights included the Super Select 4WD system. Style facelifts occurred in 2009 and 2013 before production wrapped up in 2015. The powertrain lineup incorporated efficient engine families paired with robust manual, automatic, or continuously variable transmissions depending on trim selection. Drivetrain engineering integrated advanced suspension tuning and traction management systems. Periodic mid-cycle cosmetic and technical updates refreshed front-end aesthetics, lighting technology, and cabin infotainment features, maintaining competitive positioning across international consumer segments throughout its production lifespan.