Symptoms
- Steering wheel or pedal vibrates when braking from highway speed
- Little or no vibration braking from lower, city speeds
- Vibration intensity may scale with how hard you brake
Likely causes
- CommonRotor thickness variation or warping, more noticeable at high rotational speedA small variation in rotor surface causes more noticeable vibration the faster it spins.
- PossibleWheel balance issue mistaken for a brake problemWorth ruling out since wheel balance issues also show up mainly at higher speeds.
- PossibleWarped rotor from heat buildup on a highway descent or hard brakingHigh-speed, high-heat braking is more likely to warp a rotor than gentle city stops.
What to do
- Note if the vibration happens specifically during braking or also without braking at highway speed, which would point to a wheel balance issue instead.
- Check if the vibration is worse the harder you brake.
- Avoid long, hard highway braking until this is checked.
- Have a mechanic measure rotor thickness variation and runout.
- Have tires checked for balance if vibration also happens without braking.
- Have rotors resurfaced or replaced as needed based on the measurements.
Tools and parts
Brake rotorsSearch: “brake rotors for your car make and model”
When to call a pro
See a mechanic to measure the rotors and rule out a wheel balance issue, since both can cause similar high-speed vibration.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.