Review on High-Performance QP-000032 Chrome Plated Brass 32 psi Tire Pressure Monitoring Valve Cap, 4-Pack by Robert Ducki

They worked well for over a year but then I got a flat which I thought was because I drove over the glass. I checked my tire at Sam's Club and they couldn't find the slightest leak even though my tire was completely deflated twice. I thought either they were crazy or I was, but luckily it wasn't. As my tire started to lose air it finally occurred to me that it might be this pressure sensor because Sam had taken it off while checking my tire. So if you mount them on tires, be sure to take a compressor with you. One of them failed in June and the second in October. So you can get a year or two of them, but eventually they break and you have an apartment. Luckily I had a compressor in my trunk both times, but I ended up spending a few hours at Sam's club.