The 2006 Kia Optima LX is the 4-cylinder base offering for this mid-size sedan.  There is both a 2006 and 2006.5 model this year.  The early Optima LX features a 2.4-liter, 138-hp DOHC I4 engine, while the 2006.5 ups the horsepower to 161.  The old 4-speed manumatic is replaced with a 5-speed manumatic, while the 5-speed manual carries over.  Both models of the Optima LX come with full power features, cruise control, split-folding rear seats, a CD player, tachometer, and dual front-side airbags.  The 2006.5 Optima LX upgrades to larger 16-inch wheels, a security system, adds front and rear head airbags, puts audio controls on the steering wheel, and adds a tire monitor and heated mirrors.

The front-wheel drive Optima LX is equipped with an independent suspension and front and rear disc brakes.  While a rear spoiler is the only option on the 2006 Optima LX, the 2006.5 offers 17-inch wheels, leather trim, automatic headlights, foglights, and a trip computer.  Owners feel both the 2006 and 2006.5 Optima LX is a good value for the money, considering the long list of features.  They do wish ABS was at least an option, and there are some complaints about an uncomfortable steering wheel.