Just bought a duplicate set of rims for snow tires next year. Got a great deal. However, I checked with the dealer on the price of the sensor stems. . . .WOW . . .$291.00 each list, YES $291.00 each. You can buy many tire gauges for $1164.00. My question is. . .without the sensors, will the low tire pressure warning be on all the time, or will it just ignore the sensors completely, because they are not there?