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: Special Service Tools
Special Service Tools
Tool (Number and Name)IllustrationUse09546-26000Strut spring compressorCompression of coli spring09568-1S100Saperate the ball joint from the front alxe09546-3X100 Shock absorber lock nut removal toolUsed for remove the shock absorber lock nut.
...
Hyundai Elantra AD (2016-2020) Owners Manual: Air Cleaner
Filter Replacement
â– 1.6 T-GDI
â– 2.0 MPI
The air cleaner filter can be cleaned for inspection using compressed air.
Do not attempt to wash or to rinse it, as water will damage the filter.
If soiled, the air cleaner filter must be replaced.
1. Loosen the air cleaner cover attaching cl ...