I have a 2007 Mazda CX-7 and the TPM sensor on the dash has been on for months Went to the service center to ask how much they charge for the diagnosis would and they said $45 per tire but I waited a bit while looking for alternatives and found this tool so I decided to buy it and after two days of delivery I'm trying this type of tool to use for the first time. my life and found it easy to use and i scanned all my tpms sensors one by one and found the tire pressure is wrong. i thought i need to buy a new sensor but the scanner said they were ok and i put the correct pressure on each tire with this tool and drive and guess which TPMS sensor on the dash failed what for a great device