This indicator light illuminates:
In this case, we recommend you to have your vehicle inspected by an authorized HYUNDAI dealer.
Hyundai Sonata LF 2014-2019 Owners Manual: Scheduled Maintenance Services
Follow Normal Maintenance Schedule if the vehicle is usually operated where none
of the following conditions apply. If any of the following conditions apply, you
must follow the Maintenance Under Severe Usage Conditions.
Repeated short distance driving.
Driving in dusty conditions or sandy area ...
Hyundai Sonata LF 2014-2019 Service Manual: Rear Seat Assembly Components and Components Location
Component Location
1. Rear seat cushion assembly2. Rear seat back assembly
...