Before driving your vehicle, check to see that your inside rearview mirror is properly positioned. Adjust the rearview mirror so that the view through the rear window is properly centered.
WARNING
Make sure your line of sight is not obstructed. Do not place objects in the rear seat, cargo area, or behind the rear headrests which could interfere with your vision through the rear window.
WARNING
To prevent serious injury during an accident or deployment of the air bag, do not modify the rearview mirror and do not install a wide mirror.
WARNING
NEVER adjust the mirror while driving. This may cause loss of vehicle control resulting in an accident.
NOTICE
When cleaning the mirror, use a paper towel or similar material dampened with glass cleaner. Do not spray glass cleaner directly on the mirror as that may cause the liquid cleaner to enter the mirror housing.
Hyundai Elantra AD (2016-2020) Service Manual: Heated Oxygen Sensor (HO2S) Description and Operation
Description
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina
and is installed both upstream and downstream of the Catalytic
Converter. It varies in accordance with the air/fuel ratio.
The sensor must be hot in order to operate normally. To keep
it hot, the sensor has a heater ...
Hyundai Elantra AD (2016-2020) Service Manual: Accelerator Pedal Repair procedures
Removal
1.
Turn the ignition switch OFF and disconnect the negative (-) battery cable.
2.
Disconnect the accelerator position sensor connector (A).
3.
Remove the installation nuts (A) and then remove the accelerator pedal module.
Installation
1.
Installation is reverse of removal. ...