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.

Use only the specified rear differential fluid. (Refer to "Recommended lubricants and capacities" in section 8.)

    See also:

    Roomy New Interior
    However, the Optima's quiet new interior is more upscale and will accommodate four tall adults, or five in a pinch. Front seats are supportive, and the rear-seat area is impressively roomy—alt ...

    Windows
    Power windows (if equipped) (1) Driver’s door power window switch (2) Front passenger’s door power window switch (3) Rear door (left) power window switch* (4) Rear door (right) power windo ...

    Defroster
    The defroster heats the window to remove frost, fog and thin ice from the interior and exterior of the rear window, while engine is running. NOTICE • To prevent damage to the conductors bo ...