I have Nissan Sentra GXE year 2000 model and it has 143K miles on it. I get a hammering noise on the front passenger side wheel when I apply brake. I did replace caliper, brake master cylinder, rotors, brake pads and brake shims but no luck. The noise is like “ta ta ta ta…” and it gets louder based on speed of car. Brake pads and rotors been replaced 3 times in last 2 years to get rid of noise and been seen by 4 mechanics so far no one could find the exact problem. I also took the car to Nissan dealership they also recommend changing brake pad and rotors which I already did thrice. Can anybody suggest what could be the real problem as I have already spend enough on this problem and dont want to spend any more until real problem is found. Please advice.