If you hear a constant grinding noise from the front brakes, even when not pressing the brake pedal, it is possible the wheel hub has shifted in the steering knuckle causing the brake rotor to grind against the caliper bracket. The hub will need to be inspected (replaced if necessary) and Mazda has a repair procedure for this concern.
Noise due to brake rotor grinding against caliper bracket on Mazda Mazda3
Average mileage: 85,400 (29,000–120,800)
11 people reported this problem
2009 Mazda Mazda3 103,000 mi, Visitor
replaced my rotors, now the rotor is grinding against the caliper bracket. there is a groove in my brand new rotor from driving less than a quarter mile.
2005 Mazda Mazda3 120,800 mi, Visitor
Rotor has ring ground into it due to caliper rubbing against it. Brake pads are good, only grinds when making left turns. Makes a metal to metal grinding sound with some shavings present on brake caliper mount.
2012 Mazda Mazda3 29,000 mi, Visitor
2007 Mazda Mazda3 92,000 mi, Visitor
Had rotor and wheel bearing replacement on Front Right. Now with slight right turns the rotor is rubbing against the caliper bracket. May be shotty bearing installation or change in shape.
Noise due to brake rotor grinding against caliper bracket only when steering right