For proper maintenance, safety, and maximum fuel economy, you must always maintain recommended tire inflation pressures and stay within the load limits and weight distribution recommended for your vehicle.

All specifications (sizes and pressures) can be found on a label attached to the driver's side center pillar.
Tires and Wheels
Recommended Cold Tire Inflation PressuresHyundai Elantra AD (2016-2020) Service Manual: External AMP Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Open the trunk, remove the right luggage side trim.
(Refer to Body - "Trunk Trim")
3.
Remove the external amplifier (B) after disconneting the connector (A) and loosening the mounting nuts.
Installation
1.
Install the exte ...
Hyundai Elantra AD (2016-2020) Owners Manual: Defroster
NOTICE
To prevent damage to the conductors bonded to the inside surface of the rear
window, never use sharp instruments or window cleaners containing abrasives to clean
the window.
If you want to defrost and defog the front windshield, refer to the "Windshield
Defrosting and Defogging&q ...