2008 Mazda CX7. Factory powertrain warranty is still in effect, 60 months/60,000 miles. Service interval on serpentine belt isn’t usually before 60k, it’s been 90k on vehicles I’ve owned. Toyota, Subaru, Nissan, Ford, GMC. Can’t say about Mazda but there is some commonality with Ford, having been owned in part by them.
I have a ‘96 626 with 180k miles that I have been trying to run into the ground for 4 years for an excuse to get something newer. Haven’t put a dime into it other than what it needs to pass inspection and it runs perfectly. I don’t even change the oil. Just got a new vehicle 2 weeks ago so now the Mazda is to be used as a spare, but that thing has been unbelievably reliable and easy for DIY work as well.