Don't get me wrong, I love AutoZone but this thermostat in particular is not a reliable product. It went bad in 11 months overheating my Jeep and costing a tow. Replacement was free at AZ but second one went bad in 4 months. Frustrated I got the 3rd one at another part store and it went bad in 5 months. Each time received a refund but cost 2 tows, my lost time at work and repair time. I am a pro at changing it now though so hit me up if you need help with your Wrangler. All kidding aside, I truly believe there is a manufacture issue (with this part specifically) and it is across retail chains too... The first two from AZone were Duralast, can't recall the name from the other place. Each time it failed in the stuck closed position which is the worst possible scenario. My last overheat was on July forth, luckily within my neighborhood so didn't have to tow. I think this could be a class action suit, but seriously I hope AutoZone looks into this...
What kind of vehicle do you drive? 2016 Jeep Wrangler JK Black Bear edition.