The company's first all-aluminum I4 engine, dubbed Theta, debuted in the new Sonata. Engine choices at launch were a 2.4-liter I4 rated at 5800 rpm and a 3.3-liter V6 rated V6. In Korea, the 2.4-liter option was sold as the F24S (24 = 2.4L, S = Special). The 2.0-liter gasoline version was only sold in Korea and proved more popular there due to added gas, tax and insurance savings. Diesel versions are available in Europe, New Zealand and Singapore, where they are a popular replacement for the Toyota Comfort taxi cab. 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 U.S. Environmental Protection Agency as a mid-size car, the fourth generation was longer and taller and wider than the previous generation. Standard features in U.S. models 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). Safety Europe: 2006 year models received the following European New Car Assessment Program (Euro NCAP) ratings: Adult Occupant: , score 27 Child Occupant: , score 37 Pedestrian: , score 12 In Insurance Institute for Highway Safety tests the Sonata received a "Good" overall in the frontal impact crash test, an "Acceptable" overall score in the side impact crash test, and a "Good" rating for rear crash protection. In the roof strength evaluation 09 and 10 models were rated "Marginal". 2006 Hyundai Sonata tested by the U.S. National Highway Traffic Safety Administration (NHTSA): Frontal Rating (Driver): Frontal Rating (Passenger): Side Rating (Driver): Side Rating (Passenger): Rollover: Facelift (2008–2010) The redesigned vehicle was unveiled at the 2008 Chicago Auto Show as a 2009 model year vehicle. The production version was sold as the Hyundai Sonata Transform in Korea, and the model debuted elsewhere as an 'early' 2009 model. The styling was done primarily at Hyundai-Kia America Technical Center, Inc. (HATCI) in Superior Township, Michigan in 2006. The redesign features revised engines, front fascia and chrome 3 bar grille, taillights (turn signals became red in North America only), jewel-projector headlights, new 10-spoke alloy wheel design for the Limited models (as opposed to sharing the 5-spoke design from the SE model), and an extensively revised IP (Instrument Panel). Hyundai adopted "slush molding", a production technique that enables a much higher grade of texturing and shaping of the IP surface.