Hyundai Sonata (2011)

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    22,500 miles (36,000 km) or 18 months
    ❑ Inspect air cleaner filter ❑ Inspect vacuum hose ❑ Replace engine oil and filter (22,500 miles (36,000 km) or 36 months) ...

    Service Requirements
    To ensure that you receive the greatest number of miles of satisfying operation from your Hyundai, certain maintenance procedures must be performed. Although careful design and engineering have re ...

    Coolant
    The coolant should be changed at the intervals specified in the maintenance schedule. ...