 Complete the following phrase:  Renault had introduced turbocharged engines to Formula One in 1977. Brabham had tested a BMW four-cylinder M12 turbocharged engine in the summer of 1981. For the 1982 season the team designed a new car, the BT50, around the BMW engine which, like the Repco engine 16 years before, was based on a road car engine block, the BMW M10. Brabham continued to run the Cosworth-powered BT49D in the early part of the season while reliability and driveability issues with the BMW units were resolved. The relationship came close to ending, with the German manufacturer insisting that Brabham use their engine. The turbo car took its first win at the Canadian Grand Prix. In the Constructors Championship, the team finished fifth, the drivers Riccardo Patrese, who scored the last win of the Brabham-Ford combination in the Monaco Grand Prix, 10th and World Champion Piquet a mere 11th in the Drivers Championship. In the 1983 season, Piquet took the championship lead from Renaults Alain Prost at the last race of the year, the 