My car squeaked when I brake?

They need to turn the drums on a brake lathe. If it's disk brakes, they need to only apply anti-squeal compound to the backsides or the pads. It always works.

if you have brake drums and shoes then the drum probably needs rubbing with emery paper, over time especially with heat the surface of the drum can become to smooth and shiny, the surface can become smooth and slippery causing a squeak, so use emery paper to roughen the drum.

Take it in