Brake Rotors (Discs)
What it is
Brake rotors (discs) are the metal discs that spin with each wheel; the brake pads clamp them to stop the car. They wear and can warp over time.
What it does
They provide the friction surface and shed braking heat. Warped or scored rotors cause a pulsing pedal, vibration when braking and reduced stopping power.
Symptoms of failure
- Steering-wheel or pedal vibration when braking
- Pulsing brake pedal
- Scoring, grooves or a deep lip on the rotor
- Squealing or reduced braking
- Blue heat spots (overheated rotors)
Which vehicles need it
Every car with disc brakes. Front rotors take the most heat and warp first.
Replacement cost
| DIY (part only) | $40–$180 |
|---|---|
| At a shop (parts + labor) | $250–$600 |
| Replacement interval | Often every 2–3 pad changes, or when below the minimum thickness stamped on the rotor. |
| DIY difficulty | Moderate (DIY) — bolts on with the pads; replace in axle pairs |
| Recommended brands | Brembo, Bosch, Centric, ACDelco |
Where to buy the part
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Frequently asked questions
Why does my steering wheel shake when I brake?
The classic cause is warped or unevenly worn front rotors — the thickness variation makes the pedal and steering wheel pulse as the pads grab and release. Resurfacing or replacing the rotors fixes it.
Can I resurface rotors instead of replacing them?
If they are still above the minimum thickness, machining can true them up. If they are at or near minimum, scored deeply, or cracked, replace them — modern rotors are often cheap enough that replacement is the better value.