Kia Optima: Specifications & Consumer information / Tire specification and pressure label

The tires supplied on your new vehicle are chosen to provide the best performance
for normal driving.
The tire label located on the driver's side center pillar gives the tire pressures
recommended for your vehicle.
The vehicle certification label attached on the driver’s side center pillar gives
the vehicle identification number (VIN). ...
■ Gasoline engine (THETA 2.4L GDI)
The engine number is stamped on the engine block as shown in the drawing.
...
Other information:
When the “Check System” warning message appears, the system is not working properly.
In this case, take your vehicle to an authorized Kia dealer and have the system
checked.
WARNING
The Driver Attention Warning system is not a substitute for safe driving
practices. It is the respon ...
The sensor may be limited when the below conditions.
If there is a problem with the BCW system, a warning message will appear and
the light on the switch will turn off. The system will turn off automatically.
One or both of the sensors on the rear bumper is blocked by dirt or snow
or a f ...