

Air bag warning labels, required by the U.S. National Highway Traffic Safety Administration (NHTSA), are attached to alert the driver and passengers of potential risks of the air bag system. Be sure to read all of the information about the air bags that are installed on your vehicle in this Owners Manual.
Additional Safety PrecautionsHyundai Elantra AD (2016-2020) Owners Manual: System Malfunction
Check Driver Attention Warning (DAW) system
When the warning message appears, the system is not working properly. In this
case, have the vehicle inspected by an authorized HYUNDAI dealer.
WARNING
The Driver Attention Warning system is not a substitute for safe driving
practices, but a c ...
Hyundai Elantra AD (2016-2020) Service Manual: Knock Sensor (KS) Description and Operation
Description
Knocking is a phenomenon characterized by undesirable
vibration and noise and can cause engine damage. Knock Sensor (KS) is
installed on the cylinder block and senses engine knocking.
When knocking occurs, the vibration from the cylinder block
is applied as pressure to the piez ...