knocking noise when breaking

Asked by Oct 23, 2016 at 11:22 AM about the 2011 Audi A4

Question type: General

When applying  foot break, there is a knocking  
sound (koo!) at the front or back wheel - left hand
side of a driver while driving slow.  Sometimes it
doen't sound. Three Times in six breakings

2 Answers

16,810

Did you just have some brake work done ?

31,585

First...it is "brake" not break. The thing I would check first would be to see that all the lug nuts are tight as a loose wheel can make similar sounds. Then have the suspension and brake system checked for loose parts. Noises are hard to diagnose via the internet.

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