The Sauber C37 is a Formula One racing car designed and constructed by Sauber to compete during the 2018 FIA Formula One World Championship. The car was driven by Marcus Ericsson and reigning Formula 2 champion Charles Leclerc, who replaced Pascal Wehrlein. The C37 made its competitive début at the 2018 Australian Grand Prix and uses a 2018-specification Ferrari engine. This was the last car to be raced under the Sauber name as they were renamed as Alfa Romeo for the 2019 season, although the team's structure has remained unchanged.