Lately I noticed a clunk coming from front of the car when brake is
applied at a color light. This happened on and off and I took to the
car to the dealer. They did diagnostics and told me it is coming from
brake callipers and they need to be cleaned and oiled.So I got it done
for around $100. But I still hear the noise on and off. It has done
53k miles and the brake pads were replaced at 32k. Is this a sign of
deterioration of the brake system?