Mazda unveiled the 2010 Mazda 3 sedan at the Los Angeles Auto Show on November 19, 2008. The new Mazda 3 is slightly larger than the old Mazda 3, and is available in "i" and "s" versions. The "i" is powered by a 148 horsepower (110 kW) 2.0L engine while the "s" is powered by a 167 horsepower (125 kW) 2.5L engine adapted from the Mazda 6.Both engines are also available in PZEV versions, the 2.0 producing 144 hp (107 kW) and the 2.5 producing 165 hp (123 kW).The 3s Grand Touring model adds leather seats, power driver's seat with memory, rain-sensing windshield wipers, dual-zone automatic climate control, and steerable active bi-xenon headlights as standard equipment.
The European model of the Mazda 3 will include the i-stop feature which is claimed to increase fuel economy by roughly 12% (less than a hybrid.) This feature stops the engine each time the car comes to a complete stop, it quickly starts up again without the need of a starter when the vehicle proceeds. Like the previous generation, the Mazda 3 hatchback variant has been selected as the basis for the 2nd generation Mazdaspeed3.[citation needed]
The hatchback was unveiled a few weeks after the sedan at the Bologna Motor Show. Full details and images of the high-powered Mazda 3 MPS were released at the Geneva Motor Show in March 2009