Toyota Mark X late 1960s. Instead of being based on a modified Supra chassis "A" series platform, the Mark X continues to use the Toyota "X" platform, and does not share its platform with the Toyota "S" series platform used under the Toyota Crown and the Lexus GS. The continuation of describing this vehicle as the "X" series is a reference to the first dedicated Mark II platform introduced in 1972. Major changes to the Mark series are the engine and footwork. Toyota discontinued the straight-six engines used in the Toyota Verossa, which included the JZ series and the G series engines, and
Toyota Auris the void left by the discontinued Scion xB, Toyota stated that it was not a direct replacement. The iM was only offered with a 1.8 L "2ZR-FAE" Valvematic DOHC 16-valve Inline four cylinder engine that produces and . The engine is mated to a six speed manual transmission or a continuously variable transmission (CVTi-S). In the United States, the Scion iM sold 5,097 units in 2015. Due to the discontinuation of the Scion marque, the vehicle was re-badged as the Toyota Corolla iM for the 2017 model year. The Toyota Corolla iM therefore has the Toyota and iM emblem, but