Squeak problems with Mazda3

[doctorwayne]

My Mazda is considerably older than yours, but quite a few years ago, I took it in to mechanic that I knew.  He had it for several days, and while he heard the noise, couldn't trace it.  They finally put the car on the hoist and with the engine running and the mechanic revving it, a helper, watching from below, discovered that the rear engine-mount had broken...it was in a position that was viewable from above, with the hood open, but from that viewpoint, the fact that it had broken was not evident. They immediately contacted Mazda and were credited with finding that glitch, resulting in a world-wide recall of those 2004 models.
Because of that recall, and the fact that your Mazda is newer than mine, it's unlikely to be the cause of the noise in yours, but it wouldn't hurt to mention it to your mechanic.

Wayne