I have a 2007 Mazda 6, and after cruising for a while on the highway, I started to hear a very loud squealing noise coming from the rear wheel on the drivers side. It's an extremely high pitched and loud squeal... hurts the ears.
After the trip, I felt the alloy wheel itself and it was burning hot. I touched the rotor and it nearly burned me. I tried the other wheels and they weren't hot at all.
The squealing happens at around 40-60 mph, regardless of whether I'm on the brakes or not.
The calipers, rotors, and the wheel itself are extremely hot. It also has a very bitter burning smell.
How would I be able to isolate this problem?