First Generation (2004-present)

Toyota unveiled the Mark X sedan, successor to the Mark II sedan which has been on the market since the late '60s. Instead of being based on a modified Supra chassis, the Mark X shares its platform with the Toyota Crown and it's siblings the Lexus GS and the 2nd Generation IS Sport Sedan. Major changes the Mark series is the engine and footwork. Toyota discontinue the majority of their straight six engine, more specifically the JZ series and the G series motor and went to the newly developed GR series motor. Either the 2.5L 4GR-FSE or the 3.0L 3GR-FSE is made available, both pair to a 6-speed sequential automatic transmission. No manual transmission is offered.
A first in its class is the rear bumper with integrated exhaust outlet, which later made its way on to the new LS series and the new Crown. New led light for the ceiling runs from the front of the vehicle to the rear creating a "mood" lighting system. The led system is also incorporated into the gear shifter and key area of the vehicle.
Minor changes were made in 2006. Mirror mounted turn signals replaces the fender mounted turn signal, and a redesign grille. Mark X with all black interior deleted the wood trim in favor of the brush aluminum trim. A formal introduction of the "S package" which gain the 3-spoke steering wheel and changes to the exterior lip piece.
For model year 2007 on Japanese models only, G-BOOK, a subscription telematics service, is offered as an option.
This generation continues to be sold in China by the Tianjin FAW Toyota Motor Co. Ltd. as the Reiz (transliterated into Mandarin Chinese as '锐志'). The Reiz is sold as the 2.5S, 2.5V and 3.0V Premium with 2,497 cc 5GR and 2,995 cc 3GR engines.[2]
The Mark X Supercharged version uses the 3GR-FSE engine with a supercharger added.[3] Power output is 316 horsepower (236 kW) at 6200 rpm and 42.0 kilogram metres (412 N·m; 304 ft·lbf) at 3200 rpm, paired to a 6 speed auto transmission.