2007 Q7 4.2 power brakes

[Cody]

In order of most likely to least, I would suspect:




-vacuum supply issue. I forget if they have a venturi vacuum valve, but if they do it could be clogged


-bad check valve at the booster


-bad booster




-Cody







On Tue, Dec 11, 2018 at 2:56 PM -0500, "Dave Fain" <kf21857 at gmail.com> wrote:










The brake power assist on my Q7 seems to be failing.  I had to make a quick
stop the other day and really had to stand on it.  My wife is nervous about
driving it.  Any suggestions as to what to look at?  No obvious vacuum
leaks.
thanks,
Dave
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