The Mazda 3 DI 4-Door is a popular mid-size sedan from the Japanese automaker, Mazda. It is powered by a 2.0-liter four-cylinder engine that produces 155 horsepower and 150 pound-feet of torque. It is available with either a six-speed manual or six-speed automatic transmission. The Mazda 3 DI 4-Door has excellent fuel economy, providing up to 29 MPG in the city and 41 MPG on the highway. It is also well-equipped with standard features such as a seven-inch touchscreen infotainment system, Bluetooth and USB connectivity, Apple CarPlay, Android Auto, rearview camera, Blind Spot Monitoring, and more.