Very disappointed! It said the sensor was programmed for my 2010 Nissan Altina sedan. Well, the place I installed it said it would fit perfectly, but it was NOT programmed as advertised. So I got stuck with the sensor in my tire and couldn't get it back. Very dissatisfied customer! My tire fitter Nan said buy one pre-programmed and he will install it for free. Well I lost money because the sensor was left in the tire. Didn't want to be removed and recharged. So I am a VERY dissatisfied customer. Now I haven't programmed a sensor and I'm driving alone, unaware that the other tire is too low; the signal lamp stays on. There is no way to detect a low tire. Very upset to say the least.