Midway through the 2006 model year, Kia issued a redesigned version of its midsize sedan. Redesigned for what Kia tabbed a "2006.5" model year, the front-wheel-drive Optima shared its basic design with the Sonata produced by Kia's corporate-parent Hyundai, which was redesigned for 2006. Lengthened in wheelbase, the 2006.5 Optima had a wider track (distance between left and right wheels) and short overhangs. Kia claimed more interior volume than most midsize sedans, including the Accord, Camry, and Altima. Competing against the Chevrolet Malibu, Honda Accord, Nissan Altima, and Toyota Camry, Optimas came in LX and uplevel EX models. Each offered a choice of a 161-horsepower four-cylinder engine or a 185-horsepower V6. Both engines gained power and promised improved gas mileage. Output of the four-cylinder was 15-percent greater than in the prior Optima model. A five-speed manual transmission was standard on the four-cylinder LX. Five-speed automatic with a gated shifter and Sportmatic operation was optional for that model, and standard otherwise. All Optimas included front side airbags and curtain side airbags. EX sedans added alloy wheels, foglamps, solar glass, an eight-way power driver's seat, automatic temperature control, and a leather-wrapped steering wheel. Antilock braking and traction/antiskid control were available in an option package for LX V6 and EX models. Leather upholstery and heated front seats were optional for EX models, as were power-adjustable pedals. A new Appearance Package included Michelin 17-inch tires, a blacked-out grille and headlights, aluminum interior trim, and Supervision meter cluster.