Rotor

Is this a “warped” rotor?

Is this a “warped” rotor?
  • 4055
  • Mark Baldwin

If you notice your steering wheel or brake pedal wobble when you apply the brakes to slow down or stop, chances are your rotors are warped. If the warp isn't too bad, you might not really notice the shaking. If the warp is serious, you'll definitely feel the vibration.

  1. How can you tell which rotor is warped?
  2. How do I know if my front or rear rotors are warped?
  3. What happens if my rotors are warped?
  4. What are the signs of a bad rotor?
  5. Is it cheaper to resurface or replace rotors?
  6. Can a warped rotor be fixed?
  7. How much does it cost to fix a warped rotor?
  8. Can a bad wheel bearing cause warped rotors?
  9. Can a bad caliper warp a rotor?
  10. Do I need an alignment after changing rotors?

How can you tell which rotor is warped?

Hold the straight edge of your ruler lengthwise against the surface of the brake rotor. Look between the rotor and the ruler. If you see a gap between the two, it's a good sign the rotor has been warped. A warped rotor must be replaced with a new one.

How do I know if my front or rear rotors are warped?

Probably the most common sign of a warped brake rotor is the vibration through the brake pedals when pressure is applied on them. Sometimes you can feel it even when there is only a light amount of pedal pressure on the brakes. Other times, it can only be felt when slowing down drastically from higher speeds.

What happens if my rotors are warped?

A warped rotor can cause the brakes to temporarily fail. The warped rotor causes the brake pads to wiggle back and forth, which causes the brake fluid to foam up so the braking system does not get the proper amount of hydraulic pressure. ... This is because the rotors will be contacting your brake pads unevenly.

What are the signs of a bad rotor?

What are the symptoms of a bad brake rotor?

Is it cheaper to resurface or replace rotors?

Some installers tell us it's cheaper and easier just to replace the rotors. But if the runout is in the hub, new rotors won't make any difference. They will either have to be cut on the car, or shimmed to correct the runout.

Can a warped rotor be fixed?

Can You Fix Warped Brake Rotors? Depending on how warped your rotors are, a mechanic may be able to straighten them. The process of “fixing” brake rotors is called turning or resurfacing. Brake rotor resurfacing involves scraping down the warped metal to achieve a smooth surface.

How much does it cost to fix a warped rotor?

If significantly warped, you must replace it. Cost as little as $15 for some vehicles, or $2000 if a sporty carbon-fiber rotor.

Can a bad wheel bearing cause warped rotors?



Severe looseness related to a worn or damaged bearing can cause excessive runout, which can cause uneven wear on the brake pads and/or rotor. The most common cause is a warped rotor due to the caliper not retracting.

Can a bad caliper warp a rotor?

Brake rotors don't warp; they wear unevenly

On the face of it, there would be no reason for the rotor to wear unevenly since under normal braking, the brake caliper applies an even and consistent clamping force over the entire rotor / pad contact area as the rotor rotates.

Do I need an alignment after changing rotors?

Hello - a front-end alignment is neither required or useful after replacing a brake rotor. Replacing the rotor will not enhance, or detract from, your existing wheel alignment.

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