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Get a new air filter for your 2012 Kia Optima to ensure that your engine has free air flow and a proper air fuel ratio. Browse our selection of aftermarket 2012 Optima and consider buying a lifetime filter that can be cleaned rather than replaced. Keep your engine breathing at maximum efficiency when you replace your 2012 Optima's engine air filter after every other oil change, or at the service interval recommended by your owner's manual.