sound deadening. Incorporation of the radio antenna into the rear glass and extensive wind tunnel testing helped reduce the coefficient of drag from 0.348 to 0.326. It was subsequently launched in Europe in September 2005 at the Frankfurt Motor Show. A restyled hatchback with the sedan's updated instrument panel was presented as the Chevrolet Aveo during the 2007 Frankfurt Motor Show, to be marketed in Europe and North America. The Korean market's restyle of the hatchback, the Gentra X, featured a less distinct/more "normal" grille treatment that formed the basis for the Holden, Pontiac and Suzuki-branded variants. Later iterations, including the Kalos, Aveo, Barina and Gentra sedans, the Gentra X hatchback and the 2007 "Frankfurt Show" hatchbacks were styled in-house and with the assistance of PATAC, and depart notably from the original Giugiaro exterior and interior styling designs. With launch of the Gentra X in South Korea, GMDAT had replaced engines of T250. 1.2 L S-TEC II inline-four engine was updated with features such as dual overhead camshaft (DOHC) and timing chain (older version has timing belt) system. 1.6 L E-TEC II engine had replaced with ECOTEC (GEN-III) engine with new features such as variable valve timing mechanism. Safety US Aveo safety features include available four-channel, four-sensor ABS system with electronic brake force distribution (EBD), and front (dual-stage) and side air bags for front row occupants with a passenger-sensing system. Beginning with 2008, Aveo standard equipment includes a tire pressure monitoring system. The T250 model has been tested by the European New Car Assessment Program (Euro NCAP): Adult Occupant: – 21 calculated as 3 for front plus 15 for side, with a struck out star: "The driver's chest made contact with the steering-wheel, distorting the rim. Compression of the driver's chest indicated an unacceptably high risk of life-threatening injury. As a result, the final star of the adult occupant rating is struck through." Child Occupant: , score 39 Pedestrian: , score 19 These ratings apply only to 4-door sedan Aveo. The 5-door/3-door hatchback model has not been tested by EuroNCAP but since it has the same floor as T200 model it earns 3 stars without side airbags and 4 stars with side airbags. The Australian version of the T250 three-door, the Holden Barina, was crashtested by ANCAP and gained a four-star rating. The American Insurance Institute for Highway Safety (IIHS) gave the Aveo an Acceptable overall rating in the frontal