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) Owners Manual: Side air bags
Your vehicle is equipped with a side air bag in each front seat.
The purpose of the air bag is to provide the vehicle's driver and the front passenger
with additional protection than that offered by the seat belt alone.
The side air bags are designed to deploy during certain side impact ...
Hyundai Elantra AD (2016-2020) Service Manual: Front Seat Frame Assembly Components and Components Location
Component Location
1. Front seat back frame assembly2. Front seat cushion frame assembly
...