How do i know if i need to change my brake disc's?

If the brakes are not responding as they have been previously there may be a problem. You can take off the wheels %26amp; check the thickness of the brake pads visually %26amp; at this time your disc's are exposed check them for smoothness. If the disc's have ridges you can replace those or have them machined. Usually you could get them machined ok it depends on how thick the disc is. I hope this answers your question OK.How do i know if i need to change my brake disc%26039;s?
if they have grooves, marks, wobble, etc. A shop will tell you for free if they can be turned/machined, they dont always need replacing. there is a measurement and it is specific to your rotor or disc. take it in for a free inspection, most places will.How do i know if i need to change my brake disc%26039;s?
Most cars have a metal finger/spring attached to the disc. If the pad is worn down far enough the spring rubs on the rotor and makes a squealing noise. That's the usual clue. You can always visually inspect them and measure if the remaining thickness meets specifications and of course if the car doesn't stop as quickly as it once did or pulls to one side, or vibrates when the brakes are applied you need to have both the discs and rotors inspected.

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