Kia Optima: Check battery and cables

Use high quality ethylene glycol coolant

Your vehicle is delivered with high quality ethylene glycol coolant in the cooling system. It is the only type of coolant that should be used because it helps prevent corrosion in the cooling ...

Change to "winter weight" oil if necessary

In some climates it is recommended that a lower viscosity "winter weight" oil be used during cold weather. See section 8 for recommendations. If you aren't sure what weight oil y ...

See also:

Checking Brake/Clutch Fluid Level
Check the fluid level in the reservoir periodically. The fluid level should be between MAX and MIN indicators on the side of the reservoir. Before removing the reservoir cap and adding brake flui ...

Troubleshooting
Troubleshooting Problem Symptoms Table Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compr ...

Emergency trunk safety release
Your vehicle is equipped with an emergency trunk release lever located inside the trunk. If someone is inadvertently locked in the trunk, moving the handle in the direction of the arrow will rel ...