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
2009–11 Toyota vehicle recalls would be suspended for selected vehicles. On January 31, 2010 the "Wall Street Journal" reported that U.S. regulators cleared Toyota's proposed repair for the pedals and the company would resume production by February 8. On February 1, 2010 Toyota said that its dealers should get parts to fix the sticky accelerator pedal by the end of the week. According to the manufacturer, Toyota's accelerator pedal recall and suspension of sales in North America is confined to the following vehicles (vehicles affected are based on certain Vehicle Identification Numbers): On January 27, 2010, Toyota USA issued an expanded list of vehicles