Mazda 3 adds a performance model and is available with traction/antiskid control for 2007. These 4-dr sedans and 4-dr hatchbacks come in Sport, Touring, and Grand Touring trim, and are joined by a MazdaSpeed hatchback for '07. All have a 4-cyl engine. Models with the "i" prefix have a 148-hp 2.0-liter, "s" versions a 156-hp 2.3. The MazdaSpeed has a 263-hp turbocharged 2.3 and comes only with a 6-speed manual transmission. Other models have a 5-speed manual or a 4- or 5-speed automatic. The automatics include a manual shift gate. All have 4-wheel disc brakes. ABS, front side airbags, and curtain side airbags are standard or optional depending on model, though curtain side airbags are unavailable on the s Sport hatchback. Traction/antiskid control is standard for MazdaSpeed and s Touring and Grand Touring models. The Grand Touring versions of the s and MazdaSpeed have leather upholstery and xenon headlamps. A navigation system is a MazdaSpeed Grand Touring option. MazdaSpeeds include limited-slip differential, sport suspension, larger brakes, and 18-inch wheels, plus specific styling touches. Other models get minor cosmetic changes for 2007.