They worked fine for about a month then the tire pressure error was on constantly in the dashboard. After I asked COSTCO to remove them and replace all 4 sensors, the error went away. With a constant tire pressure error, it's hard to tell when the real problem is at hand. Also, the pressure they report seems to vary wildly with small changes in temperature compared to the factory gauges. They need to compensate for temperature changes in their electronics and correct any packet transmission errors they have. Since installing 4 wheels costs money, it's a shame to have unreliable new sensors.