If the tire is worn evenly, a tread wear indicator will appear as a solid band across the tread. This shows there is less than 2/32 inch (1.6 mm) of tread left on the tire. Replace the tire when this happens.
Do not wait for the tread surface to become level with the tread wear indicators before replacing the tire.
WARNING
To reduce the risk of DEATH or SERIOUS INJURY:
Compact spare tire replacement
A compact spare tire has a shorter tread life than a regular size tire. Replace it when you can see the tread wear indicator bars on the tire. The replacement compact spare tire should be the same size and design tire as the one provided with your new vehicle and should be mounted on the same compact spare tire wheel. The compact spare tire is not designed to be mounted on a regular size wheel, and the compact spare tire wheel is not designed for mounting a regular size tire.
WARNING
The original tire should be repaired or replaced as soon as possible to avoid failure of the spare and loss of vehicle control resulting in an accident.The compact spare tire is for emergency use only. Do not operate your vehicle over 50 mph (80 km/h) when using the compact spare tire.
Hyundai Elantra AD (2016-2020) Owners Manual: Good Braking Practices
WARNING
Whenever leaving the vehicle or parking, always come to a complete stop and
continue to depress the brake pedal. Move the shift lever into the 1st gear (for
manual transmission vehicle) or P (Park, for Intelligent Variable Transmission (IVT)/
dual clutch transmission vehicle) position ...
Hyundai Elantra AD (2016-2020) Service Manual: Stop Lamp Switch Schematic Diagrams
Schematic Diagram
System circuit diagram
Terminal function
TeminalDescription1IGN12Engine Control Module (ECM)3B+4Stop Lmap
...