air suspension Hyundai Sonata

Hyundai Sonata https://www.carmanualsonline.info/img/35/16847/w960_16847-0.png Hyundai Sonata

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Hyundai Sonata VEHICLE MAINTENANCE REQUIREMENTS   5- 5
Note :
*1. FOR CALIFORNIA, THIS MAINTENANCE IS RECOMMENDED, BUT NOT REQUIRED.
*2. FOR EVERY 12 MONTHS OR 12,000 MILES (20,000 KM), WHICHEVER OCCURS FIRST : "R"