replaced original brake pad @ 70k , now is 120k, "ji.." sound was heard when brake, went to work shop, was told the front brake pad still can last at least 6 month, brake disc, brake shoe also normal. as the brake pad was alreday taken out, decideed to replace with original brake pad, but after server days, the sound happened again when brake, not loud, really confused what could be the problem? anyone got similar experience?