In November 2006 Toyota purchased 5.9% of Isuzu, becoming the third largest shareholder behind Itochu and Mitsubishi Corporation, and the two companies agreed to study possible business collaboration focusing on the areas of R&D and production of diesel engines, related emissions-control, and other environmental technologies. In January 2007 Isuzu and General Motors updated the LCV range with a 3.0 litre common rail diesel engine that had far more torque and power than its predecessor. In August 2007 Isuzu and Toyota agreed to develop a 1.6-liter diesel engine for use in Toyota vehicles sold in European markets. At this point, details of development, production and supply of the diesel engine were still under discussion, but in principle, Isuzu would play the leading role, with production scheduled to begin around 2012.