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: Dynamic Damper Repair procedures
Removal
1.
Remove the front driveshaft.
(Refer to Driveshaft Assembly - "Front Driveshaft")
2.
Remove the TJ joint assembly.
(Refer to Driveshaft Assembly - "TJ Joint")
3.
Remove the remove the both side of band (B) of the dynamic damper (A).
4.
Fix the driveshaft (A) with a vice ...
Hyundai Elantra AD (2016-2020) Owners Manual: Door Locks
Operating Door Locks from Outside the Vehicle
Mechanical key
If you lock the driver's door with a mechanical key, all vehicle doors will lock.
If you unlock the driver's door with a mechanical key, the driver's door will unlock
and the passenger doors will unlock according to the ...