See also:

Tire Pressure Monitoring System (TPMS)
Low Tire Pressure Telltale TPMS Malfunction Indicator Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the ...

Safety
The Hyundai Sonata is one of only two cars on the market that have received both a Top Safety Pick designation from the Insurance Institute for Highway Safety and a five-star overall safety rating ...

Use of MTBE
HYUNDAI recommends avoiding fuels containing MTBE (Methyl Tertiary Butyl Ether) over 15.0% vol. (Oxygen Content 2.7% weight) in your vehicle. Fuel containing MTBE over 15.0% vol. (Oxygen Content 2. ...