Seat warmers
Seat warmers are provided to warm the seats during cold weather.
WARNING
The seat warmers can cause a serious burn, even at low temperatures and especially if used for long periods of time.
Passengers must be able to feel if the seat is becoming too warm so they can turn it off, if needed.
People who cannot detect temperature change or pain to the skin should use extreme caution, especially the following types of passengers:
WARNING
NEVER place anything on the seat that insulates against heat when the seat warmer is in operation, such as a blanket or seat cushion. This may cause the seat warmer to overheat, causing a burn or damage to the seat.
NOTICE
To prevent damage to the seat warmers and seats:

While the engine is running, push either of the switches to warm the driver's seat or passenger's seat.
During mild weather or under conditions where the operation of the seat warmer is not needed, keep the switches in the OFF position.
• Each time you push the switch, the temperature setting of the seat changes as follows :
- Front

- Rear

• The seat warmer defaults to the OFF position whenever the ignition switch is in the ON position.
Information
With the seat warmer switch in the ON position, the heating system turns off or on automatically depending on seat temperature.
Rear seat head restraints
Air ventilation seatsHyundai Sonata LF 2014-2019 Service Manual: Components and Components Location
Component Location
[Engine Room]
[Interior Relay]
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Hyundai Sonata LF 2014-2019 Service Manual: Starter Components and Components Location
Components
1. Screw2. Front housing3. Stop ring4. Stopper5. Overrunning clutch6. Lever7. Lever plate8. Lever packing9. Magnet switch assembly10. Armature assembly11. Yoke assembly12. Brush (-)13. Brush holder14. Brush (+)15. Rear bracket16. Through bolt17. Screw
...