There may be a recall. Apparently it's a common problem in the CX-9 of most years in the 2000's. In one of the posts the guy said when he bled the brakes it was fixed but not everybody had it that easy http://mechanics.stackexchange.com/...-all-the-way-to-floor-after-abs-was-activated http://www.carcomplaints.com/Mazda/CX-9/2012/brakes/service_brakes.shtml https://www.consumeraffairs.com/news/feds-probe-braking-problems-in-mazda-cx-9-022514.html http://www.arfc.org/complaints/2012/mazda/cx-9/service_brakes/problem.aspx
No hissing but there is a loud squeal once the pedal is about half to 3/4 of the way down, you know, where it should never be.
A couple of weeks ago I bought some tires. The other day I happened to look at the receipt and saw where it said to retorque the lug nuts after 75 miles. Which I didn't. Today I got a front end alignment and that receipt said the same thing. Do lug nuts on new tires get loose?