Even though your vehicle is equipped with the OCS, never install a child restraint in the front passenger's seat. An inflating air bag can forcefully strike a child or child restraint resulting in serious or fatal injury.
WARNING
Hyundai Elantra AD (2016-2020) Service Manual: Rear Shock Absorber Repair procedures
Removal
1.
Loosen the wheel nuts slightly.
2.
Raise the vehicle, and make sure it is securely supported.
3.
Remove the rear wheel and tire (A) from front hub.
Tightening torque :
107.9 ~ 127.5 N.m (11.0 ~ 13.0 kgf.m, 79.6 ~ 94.0 lb-ft)
•
Be careful not t ...
Hyundai Elantra AD (2016-2020) Owners Manual: Detecting sensor
The rear radars are located inside the rear bumper for detecting the side and
rear areas. Always keep the rear bumper clean for proper operation of the system.
NOTICE
The system may not work properly when the bumper has been damaged, or
if the rear bumper has been replaced or repaired.
...