Adjusting the side mirrors:
1. Press either the L (driver's side) or R (passenger's side) button (1) to select the side view mirror you would like to adjust.
2. Use the mirror adjustment control switch to position the selected mirror up, down, left or right.
3. After adjustment, put the button into neutral (center) position to prevent inadvertent adjustment.
NOTICE
Folding the side view mirrors
To fold the side view mirrors, grasp the housing of the mirror and then fold it toward the rear of the vehicle.
Hyundai Elantra AD (2016-2020) Service Manual: Heated Oxygen Sensor (HO2S) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the HO2S connector.
3.
Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
4.
Check that the resistance is within the specification.
Specification : ...
Hyundai Elantra AD (2016-2020) Service Manual: Front Impact Sensor (FIS) Components and Components Location
Components
1. Front right Impact Sensor (FIS)2. Front left Impact Sensor (FIS)
...