You must be a pretty young driver to have never experienced this before. While there can be other elusive causes, by far the most common is warped brake rotors. There is a published legal minimum thickness they must be. If they will still be above that minimum after machining, your mechanic can true them up on a brake lathe. That is a standard part of any brake job and most independent shops have that equipment. The exception though is for a number of years new rotors have become so inexpensive it can cost less to install new ones than for the labor and cost of maintaining the equipment.
What you need to be aware of when replacing rotors is many are made in China. There is nothing wrong with their quality, but when we make parts out of cast iron, we set them out to "age" for 90 days before they get their final machining. The Chinese cast 'em, pack 'em, and ship 'em, then they age on your car. Most of the time they will develop the same pulsation you have now. A light machining one time will take care of that. Some uninformed people demand new rotors under warranty, but those will just do the same thing in a month or two.
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Monday, October 20th, 2014 AT 3:36 PM
