South Korea, and began selling between end of 2010 and early 2011 as a 2011 model. The US version of the fifth-generation Elantra debuted at the 2010 Los Angeles Auto Show. It is powered by a new 1.8-L Nu engine producing 148 hp (145 hp-PZEV) and 131 lb-ft (130 lb-ft-PZEV). The fuel economy was aided by a low drag coefficient of just 0.28. The Nu engine block is made of aluminum instead of the previous cast iron. EPA's estimated gas mileage 40/29 was questioned by Consumer Watchdog, a Santa Monica CA consumer group. USA Today writer Jefferson Graham claimed to get combined city/highway mpg of 22 mpg. However, a real-world test by Popular Mechanics showed significantly better fuel economy than EPA estimated MPG. Also, The Truth About Cars editor tested real-world MPG, leading them to give Consumer Watchdog a thumbs down. EPA mileage estimates were originally in the city and on the highway but were revised to in the city and on the highway due to a series of testing procedural errors in November 2012. The underpinnings of the second-generation i30 and Elantra were similar in their configuration and makeup. The similarities between the second-generation i30 and Elantra continued in front end and suspension characteristics. It was available in two trim levels, GLS and Limited. Premium features included heated front and rear seats, proximity key entry with electronic push-button start with immobilizer, and touch screen navigation. US 2011 sales reached 186,361 units, up 41 percent from 2010. The Elantra was crowned North American Car of the Year at the 2012 Detroit Auto Show, over the Ford Focus and Volkswagen Passat. The Elantra was crowned South African Car of the Year for 2012. At the 8th Manila International Auto Show, the Elantra was crowned as the Philippine Car of the Year, the first Korean car maker to win the award. Hyundai Elantra 1.8 GLS won the WesBank's Car of the Year in South Africa and North American Car of the Year at the 2012 Detroit Auto Show. 2012 model year: An ActiveECO system was now included with automatic transmission models, a dual-shell horn was added, steering calibration was adjusted, fog lights and passenger side sun visor extension were added to the GLS Preferred Package, and some exterior color adjustments were made. 2013 model year: Manual transmission models received an increase in standard equipment, and heated front seats were added to the