P Metric
With the P-Metric system, Section Width is measured in millimeters.
To convert millimeters into inches, divide by 25.4. The Aspect Ratio (Section Height divided by Section Width) helps provide more dimensional information about the tire size.
Example:

(1) P = Certain tire type used on light duty vehicles such as passenger
cars
(2) Section Width in millimeters
(3) Aspect Ratio (= section height 7 section width).
(4) R = Radial Construction
(5) Rim diameter in inches
See also:
Low beam light bulbs
1. Pull off the fender lining. For details, refer to “Pulling off the fender
lining” F11- 7.
2. Remove the bulb cover, by turning it counterclockwise.
3. Disconnect the electrical connector.
...
Alarm system
It blinks to show the driver the operational status of the alarm system. For
detailed information, refer to “Alarm system” F2- 15. ...
Passenger’s frontal airbag ON and OFF indicators
Refer to “Front passenger’s frontal airbag ON and OFF indicators”. ...
