When I brake hard on my 2002 wrx the right front brake makes a scraping sound "eeeeeee". If I brake gently then no noise.
How can I tell if this is the brake wear indicator signaling the brake pad needs replacement, or noise due to surface irregularity on the rotor?
It has 55K miles on it and I drive and brake gently 95% of the time. All brake pads are original haven't been changed.