See also:

2011 Kia Optima Review
The previous generation Kia Optima was a vehicle struggling to keep up with the times, having emerged on the scene as a lackluster model masquerading as a value proposition, when in reality it was ...

Tires and wheels
CAUTION When replacing tires, use the same size originally supplied with the vehicle. Using tires of a different size can damage the related parts or make it work irregularly. ...

Transfer case (4WD)
Checking or changing transfer case fluid Have transfer case fluid checked or changed by an Authorized Kia Dealer according to the Maintenance Schedule at the beginning of this section. Use only ...