I recently replaced the rear brake pads in my 2004 Mazda 3 GT, about 5 days later I noticed a squeal coming from them almost everytime I tap the brakes. It's only heard when I tap the brakes, not if I "slam" on them and only happens after I've driven the car a while (IE: the brakes are hot). Two days later, I also noticed the a lighter squeal happening when driving at low speeds and when I got over a bump.
Wondering if anyone has had a similar problem or if they know what the cause might be. I heard this could be a case of the pads expanding b/c of the heat and the "break in" period. Or a case of where the compounds in the pads don't fair well with the rotors.
Should I continue driving on them (there's about 400km on them now) to continue the break in time, or get them checked ASAP. Any info/advice would be a great help.