2002-2008
The 4th generation Sonata was launched in August 2004 in Korea, based on a new platform created from the project NF costing of 290 billion won[citation needed]. The company's first all-aluminum I4 engine, dubbed Theta, debuted in the new Sonata. Engine choices at launch were a 2.4 L I4 that produced 164 HP at 5,800 rpm and a 3.3 L 237 hp (177 kW) V6. The diesel version was used as a taxicab in Singapore
The U.S. May 2005 launch of the new Sonata coincided with the production commencement at the company's first U.S. assembly plant — in Montgomery, Alabama.
Classified by the US EPA as a large car, the fourth generation was 2 in (50.8 mm) longer and taller and 1 in (25.4 mm) wider than the previous generation. Standard features included anti-lock braking system/electronic stability control/traction control system as well as six airbags (driver/front passenger front and side, and side curtain).
The NHTSA awarded the Sonata with 5 Stars in frontal and side crashes.[2] The Sonata received a "Good" offset frontal impact rating and an "Acceptable" side impact rating from the IIHS.