Hi,
I drive a 2019 Mazda3 with 115k miles on it. After a recent brake job with a new mechanic (my old one retired), I noticed a very annoying squeaking sound in the front wheel(s) . Initially it was happening only when I wasn't braking, and mostly under ~20mph but it does still happen when moving faster. It gets worse when the car is warmed up a bit. After a thousand miles or so it started happening when I was braking too. When it's warmed up, it would squeak like a tractor trailer when I braked.
Took it back to my mechanic, he took the brakes off and put them back on and said he didn't hear it anymore; within 5 minutes of driving I heard it again.
We gave up on that mechanic and found a new one, who told us the wheel bearing on the front passenger side was going and he replaced that. The noise stayed the same. We took it back, the mechanic said that the brakes the last mechanic put on were cheap and crystallizing which was making the sound, and he pointed out that the front passenger rotor was in worse condition than the front left one. He replaced the front brakes and rotors and said he didn't hear the sound anymore. After driving it for a bit, it STILL SQUEAKS. I haven't noticed the squeaking while braking yet, so maybe the new brakes/rotors fixed that, but the squeaking while not braking remains unchanged, and at this point I'm at a loss on what to do. I've put in well over $1000 between the brakes/rotors and the wheel bearing replacement, and I've spent days with my car at the mechanic just for it to still squeak.
The only ideas I have at this point are a caliper sticking or something in the suspension, but if it was the suspension then it doesn't really make sense why it appears when warmed up, and why it's based on driving and not going over bumps. I also don't notice any pull to either side when driving, and I checked the temperatures of the rotors after driving and they were just about the same. I also checked the dust shields to see if they were bent or close to touching, and they looked perfectly fine.
Does anyone have any ideas??
Tldr; A squeaking noise appeared after a brake change, and after replacing the wheel bearing and redoing the brakes and rotors, it hasn't gone away.