Two 737Cs were entered in the 1985 24 Hours of Le Mans, finishing 3rd and 6th in the C2 class. The 737Cs were also raced in part of the 1985 World Sportscar Championship season, managing 8th place for Mazdaspeed in the C2 teams championship. In the All Japan Sports Prototype Championship, Mazda was able to come home 5th in the constructor's championship.