The two companies originally signed a memorandum of understanding in 2011, to collaborate on a number of different projects. Among those is a hydrogen fuel cell vehicle, but a sports car was also proposed—immediately kick-starting rumors of a successor to the Supra sports car that ended production in 2002. There are few details available at present, but the vehicle is likely to use a traditional front-engined, rear-drive layout. Engine choices are up in the air, but the existing BMW Z4 uses a mix of four-cylinder and inline six-cylinder power units.