Skip the auto shop - Our mechanics make house calls

Q: My car vibrates while braking

asked by on

BRAKE PADS AND ROTERS HAVE BEEN REPLACED BUT THE PROBLEM IS STILL THERE .

My car has 28200 miles.
My car has an automatic transmission.

Hopefully, the rotors were not warped at installation by failure to use a calibrated torque wrench and observe the required tightening sequence. The only way to rule the rotors in or out as the source of the vibration is to use a dial indicator to measure run-out once the rotors are torqued properly to the hub with the lug nuts. Using a dial indicator, run out should not exceed .002 inches, that is run out should not exceed one half the diameter of a human hair. If there is run-out exceeding .002 inches, there is either something wrong with the rotors (not all rotors are created equal by the way; if you want headache free rotors unfortunately you have to buy the OEM rotors or a recognizable name brand such as AC Delco or comparable), they were warped on installation, or the hub or wheel bearings have the runout. If you do find runout to be no greater than .002 inches, the vibration is probably due to loose suspension parts which comes into play as the braking system grabs and slows each wheel. My initial suspicion though would be that the rotors are simply not running true. If you would like a specialist from YourMechanic to evaluate what you have during a brake vibration diagnostic and possibly re-index or shim the rotors to correct this issue, please set up a diagnostic and we will be glad to resolve this for you as well as address any other concerns you might have. If the rotors are judged defective, obviously they should be returned for refund under the warranty.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car won't start

Hi there, thanks for writing in. It's highly unlikely that the computer is damaged, especially with only 48,000 miles on the vehicle. You may have an issue with your key or the ignition system that is causing some electrical gremlins...

Q: I have 1971 jeepster commando that keeps getting really hot quick. Thermostat changed new radiator hose and new coolant

Hi there. It's likely that the radiator is the actual problem. Over time, the interior of older radiators will corrode and cause rust and other materials to break off and cause obstructions inside the coolant system. This can impede the...

Q: Mechanical problem with my car - 2010 Infiniti EX35

Hello there, many different faults could cause your Infiniti EX35 to run poorly. With the coolant gauge reading hot and the lack of coolant it sounds like your car overheated. When cars overheat the computer will put them into a...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.