Purchased in December 2018 to fit my new OEM Toyota alloy wheels and tires. I installed the sensors to spec with a torque wrench, no problem. My new tires were mounted on new rims with new Denso TPMS sensors. I pulled away and the TPMS light flashed and then stayed on my dash. I knew what it meant. I have arranged a follow-up inspection at a tire center. The technician said that 3 of the 4 sensors had dead batteries and could not read. If I remove them, they have to be fitted with normal valves and the tires have to be rebalanced, which is an additional expense. Do not remove them and send them in for a warranty replacement. I'll have to wait until the tires eventually need to be rebalanced, which may not be soon. Now I put a piece of black tape over the light to hide it from view. Revain is good at it. Things I will see what they recommend. Again, this is not a simple warranty replacement.