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: Owner Maintenance. Owner Maintenance Schedule
WARNING
Performing maintenance work on a vehicle can be dangerous. If you lack sufficient
knowledge and experience or the proper tools and equipment to do the work, have
it done by an authorized HYUNDAI dealer.
ALWAYS follow these precautions for performing maintenance work:
Park your vehi ...
Hyundai Elantra AD (2016-2020) Service Manual: Special Service Tools
Special Service Tools
Tool (Number and name)IllustrationUse09373-27000Alternator pulley remover wrenchRemoval and installation of alternator pulley 09964-C1100SCC reflectorReflector to align the SCC radar09964-C1200Calibration beamLaser to detect the center of the vehicle.09964-C1300Tr ...