De Mazda 929 is een automodel van het Japanse merk Mazda. De 929 werd van 1973 tot 1998 verkocht in 4 generaties. Het model was nauw verwant met de Mazda Luce en werd laatst ook verkocht als Efini MS-9.

The 1986 Luce* was large and luxurious on the HC platform, now with the 13B turbo engine as one of many engine options. It was still exported as the 929, and differed from the (continued) Cosmo. At its introduction in 1986, it was offered with Mazda's first V6 engine, called the Mazda J engine which came as a 2.0-liter, a 2.0-liter turbo, and a 3.0-liter for top level model

The Luce Royal Classic (and lesser-spec Limited) was more expensive than its 929 counterpart, featuring greater technical innovation—both were pillarless hardtops. The Royal Classic was factory fitted with a turbocharged 13B Rotary or 2.0-liter V6 engines, electric leather seats, digital speedometer, a cool-box for canned beverages, prominent emblems, electronically adjustable suspension and power options throughout. In order to satisfy Japanese regulations concerning exterior dimensions and engine displacement, this generation vehicle was built in two versions; the 3.0-liter V6 was installed in the longer and wider hardtop bodystyle, and the smaller engines, including the rotary engine, were installed in the shorter and narrower sedan bodystyle. Japanese owners who chose the rotary engine received financial benefits in a lower annual road tax bill over trim packages with the larger V6 engine. It was the larger model that carried over to the next platform that introduced the Mazda Sentia.

*The name "luce" was taken from the Italian word for "light".