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.
...
Hyundai Elantra AD (2016-2020) Owners Manual: Washer Fluid
Checking the Washer Fluid Level
Check the fluid level in the washer fluid reservoir and add fluid if necessary.
Plain water may be used if washer fluid is not available. However, use washer solvent
with antifreeze characteristics in cold climates to prevent freezing.
WARNING
To prevent seri ...