The 2015 Kia Rio is a subcompact car available as a sedan LX, and it comes standard with 15-inch steel wheels, heated power mirrors, air-conditioning, a tilt-only steering wheel, a height-adjustable driver seat, a 60/40-split-folding rear seat and a four-speaker sound system with a CD player, an auxiliary audio jack, a USB audio jack and satellite radio. Every 2015 Kia Rio comes with a 1.6-liter four-cylinder engine good for 138 horsepower and 123 pound-feet of torque. A six-speed manual transmission is standard on the LX which also comes standard with four-wheel antilock disc brakes, stability control, hill start assist, front side airbags and full-length side curtain airbags. In government crash testing, the Rio received four out of five stars for overall crash protection with four stars for total frontal and rollover protection and five stars for total side protection. Testing by the Insurance Institute for Highway Safety was a mixed bag. It received the top score of 'Good' in the moderate-overlap frontal-offset impact and roof-strength tests, as well as a 'Good' for its seat and head restraint design (for whiplash protection). However, the Rio received the second-best rating of 'Acceptable' for side-impact protection and a 'Marginal' rating (the third of four possible scores) in the IIHS' small-overlap frontal-offset test.