Mazda dealer prices getting out of control. Their pivot to near-luxury feels a little over-the-top in the service department.I just changed plugs at 45k miles. My indy quoted me $170 labor and I bought the NGKs off Ebay for $53. So spent $225 vs the dealer quote of $450. Just an fyi.
When I had my plugs changed (2018 CX9 GT AWD), I had my local oil change place swap them out for $75 cash. Worth mentioning that I'm a long way out of warranty and avoid the dealer for all things unrelated to recall.