rear clamshell doors. The IMV program also spawned the Toyota Innova (AN40) minivan (IMV4) and Toyota Fortuner (AN50/AN60) SUV (IMV5). Mainly developed in Thailand, this seventh-generation Hilux was the first to not be produced in Japan. Hilux models sold in Asian, European, Middle Eastern and Oceanian markets were initially built and assembled in Thailand with targeted annual production of 280,000 units, with 140,000 allocated for exports. Later, production was delegated to Malaysia and Southeast Asia in order to increase sales in those regions. In Thailand, the vehicle is called the Hilux Vigo. For other European markets and South Africa, the Hilux was built in Durban, South Africa. Hiluxes sold in Argentina and Brazil were built in Argentina, as with the previous generation Hilux. The double cab model has an automatic transmission. It uses the same engine as other Asian countries (in-line, 4-cylinder, 16-valve, DOHC Turbo Diesel with common rail direct injection), however engines used in Malaysia differ in their maximum output of at 3,600 rpm and maximum torque of at 1,600–2,400 rpm. The ladder frame chassis used by the seventh-generation Hilux is 45 percent stiffer compared to its predecessor. Combined with a reduction in the number of welded joints with the use of a unified inner frame, it has a higher torsional stiffness while the vertical rigidity is improved by stronger crossmembers. The model also used a new double wishbone front suspension which was said to improve stability and ride comfort. The model is also considerably larger than the previous generation Hilux. For the double cab variant, the 2005 model is longer and wider. The deck is longer and both wider and taller by . The increased size was achieved without a significant increase in the kerb weight. Drag coefficient is rated 0.36 (0.39 with over fenders), which was claimed to be "class-leading" during the time of its introduction. In Singapore, the Hilux was available as a single cab with the 2.5 L engine or a double cab with the 3.0 L engine. This generation of the Hilux was introduced for Argentina on 2 March 2005 in Buenos Aires with a market launch in April. This generation of the Hilux was also sold in Finland as the TruckMasters OX by Truck Masters Finland. Because of a modified rear suspension, the truck is registered in Finland as a light truck. The OX was only available with a 3.0-litre D-4D diesel engine.