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: License Lamps Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the trunk lid panel.
(Refer to Body - "Trunk Lid Trim")
3.
Remove the license lamp (A) after disengaging the license lamp mounting clip (B).
4.
Replace the bulb (A) after removing a lens.
Installation
1.
Install ...
Hyundai Elantra AD (2016-2020) Service Manual: Schematic Diagrams
Schematic Diagram
Canister
The Canister is filled with charcoal and absorbs evaporated
fuel vapor from the fuel tank. The gathered fuel vapor in canister is
drawn into the intake manifold by the ECM/PCM when appropriate
conditions are set.
Purge Control Solenoid Valve (PCSV)
The Purge ...