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Tire pressure monitor

The Compass uses four tire pressure monitors. There is one in each tire that wirelessly transmits the actual tire pressure to the receiver, unlike other tire pressure monitors that don't tell you the actual tire pressure but instead calculates the pressure differential between tires based on (I believe) the ABS braking system.
When the temperature suddenly dropped to -10 C, two of my four tires went into alarm mode. I brought the car to a garage to top up the air levels and stunned the owner when I told him that he put in too much. He was very impressed that a car as "cheap" as the Compass had real tire pressure gauges.

My tires range from 195 to 213 kPA. You'll never get them to be all the same.
 
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