See also:

Trailer towing
WARNING - Towing a trailer If you don't use the correct equipment and drive properly, you can lose control when you pull a trailer. For example, if the trailer is too heavy, the brakes may not ...

Rear differential (4WD)
Checking or changing rear differential fluid Have rear differential fluid checked or changed by an Authorized Kia Dealer according to the Maintenance Schedule at the beginning of this section. ...

Impressive Warranty
Hyundai is Kia's corporate parent, so the Optima gets Hyundai's impressive warranty; it includes 10-year/100,000-mile powertrain protection and 5-year/60,000-mile roadside assistance. Kia is put ...