2009 Nissan Altima squeaky noise

Tiny
NEILKANTH
  • MEMBER
  • 2009 NISSAN ALTIMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 28,000 MILES
The car squeaks and scrapes when I brake. I ve have two different mechanics look at it. The checked the brake pads and discs. All is still almost brand new.
So whats the problem?
please please help
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Saturday, May 1st, 2010 AT 10:27 AM

1 Reply

Tiny
CARADIODOC
  • EXPERT
Hi neilkanth. Welcome to the forum. What you're hearing is the result of high-quality brake pads. The linings are very hard and cause grinding noises that typically go away when they get warm and typically get worse in humid weather. The noise is worse the first time it is driven in the day due to rust buildup on the rotors from the humidity in the air.

There is usually a slight bevel on the edges of the linings to prevent the "fingernails-on-the-blackboard" screaching during the breaki-in period, but once the linings are worn enough that the bevel is gone, the squealing can start. It is customary for mechanics to file a bevel on the pads' edges too to stop that squealing but the trade-off is you lose the squeagy action pads provide after driving through deep water. That action is what prevents brake fade in wet conditions.

The only thing you can do to stop the noise permanently is to install less expensive aftermarket brake pads when they become available for your car. There are a number of other things professionals will do during a routine brake job to prevent noises but they don't pertain to a car with such low miles.

The common related complaint is you will likely need new brake rotors at almost every brake job. They are very thin to start with to save weight so there isn't much wear that can take place and still maintain the minimum legal thickness. The good news is they cost about one third as much as most rotors did in the late 1980s.

Caradiodoc
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Saturday, May 1st, 2010 AT 12:33 PM

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