The McLaren MP4/1 (initially known as the MP4) was a Formula One racing car produced by the McLaren team. It was used during the 1981, 1982 and 1983 seasons. It was the second Formula One car to use a monocoque chassis wholly manufactured from carbon fibre composite, after the Lotus 88 (which never raced), a concept which is now ubiquitous. The MP4 was first entered in a Formula One race at the third Grand Prix of the 1981 season in Argentina.