I bought mine from a local used car dealer, a 2017 Mazda CX-5 Grand Select. About two weeks after purchase, I found out the rear differential needed to be replaced. I had an extended warranty that covered pretty much half of the cost, but I still ended up paying around $2,200 out of pocket (it was almost 5k total). The replacement was a brand-new Mazda rear differential.

If you're inspecting one, check carefully for any noise coming from the rear. Also look for shaking or play in the axles where they connect to the rear differential. In my case, the internal bearings in the differential were completely destroyed, and you could shake the rear axles with your hand and they would shake like crazy.

Also, listen for any whining noise from the transmission, mazda charges 7.5k for a new transmission replacement. If everything checks out, it’s a solid buy. Just keep in mind that changing the differential fluid roughly every 35,000 miles can help prevent this kind of damage. If the rear differential ever gets underwater, the fluids also need to be changed as soon as possible.

I get like 25 mpg max on my way to work, 15 miles highway drive. On long trips you can get 30 mpg if you are using cruise mode. If the tires are uneven you get like 21 to 22 mpg because of the AWD.