The Mazda 757 was a class-winning prototype racing car built for the 24 hours of Le Mans auto race. It replaced the 737 in 1986 and was replaced by the 767 in 1988. It used a 3-rotor 13G Wankel engine.

Two 757s were entered in 1986, but neither completed the race. Of the two competing the next year, one finished with a GTP class win and seventh position overall. The single 757 at Le Mans in 1988 (along with two 767s) also won GTP, placing fifteenth overall.