See also:

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. ...

Safety-Minded
As with the rest of the Kia line-up, the 2009 Kia Optima is equipped with many safety features as standard equipment. This includes six airbags (dual advanced front and front-seat mounted side as ...

Engine oil
Checking the engine oil level 1. Be sure the vehicle is on level ground. 2. Start the engine and allow it to reach normal operating temperature. 3. Turn the engine off and wait for a few minute ...