The Mazda Luce is an executive car that was produced by Mazda in Japan from 1966 until 1991. It was widely exported as the Mazda 929 from 1973 to 1991 as Mazda's largest sedan. Later generations were installed with luxury items and interiors as the Luce became the flagship offering. The Luce was replaced by the Sentia in 1991 which was also exported under the 929 nameplate.

Executive car is a British term for a large car which is equivalent to the European E-segment and American full-size classifications. Executive cars are larger than compact executive cars, and smaller than luxury saloons / full-size luxury sedans.