Brake pedal firms overnight

seafarer28 · Jul 19, 2018

Just curious to know why my brake pedal is very hard (does not compress at all) before first start up each morning, within a second or so after start it goes back to the normal feel, subsequent starts during the day do not suffer from this anomoly .
This is the second touareg that I have/had that has developed this issue.

Anything to worry about?

TonyB

P.S. I know I have exposed myself to Nooby's quirky sense of humour with this post:frown2:

hedditch · Jul 19, 2018

Hi Tony,

Mine is exactly the same, and has always been like that. I put it down to a less than perfect vacuum chech valve on the booster.

Stuart...

seafarer28 · Jul 20, 2018

Thanks Stuart.
Happy to know that I'm not the only one with that irregularity, I did suspect something like that may be causing it.

Both of my cars seem to have acquired that issue as they aged.

TonyB

Chris Anderson · Jul 20, 2018

My 2005 R5 has the same "feature".

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yrktreg · Aug 13, 2018

Also chasing this down on our 2006

Just purchased a pair of aftermarket check valves and will be replacing them factory ones with working ones...

It's definitely a vacuum leak somewhere in the system. Could be faulty check valves, or these nice plastic hoses tend to crack where they are formed in place at the fittings.

I've inspected/ replaced all of the faulty lines so now it's check valve time...

seafarer28 · Jul 5, 2020

Just bumping this up as there is no clear indication on what's causing this, it not only happen after sitting all night, sometimes it happens at odd times as well after she's been sitting for a couple of hours.

TonyB

Matthew Nelson · Jul 5, 2020

same deal with mine although sometimes it takes a few days

jbarrakdickey@gmail.com · Jul 6, 2020

Same. It often sits for days/weeks without being driven...so not sure how long it takes to appear.

Chris Anderson · Jul 6, 2020

Same..still. Into the 4th year of ownership and it hasn't changed. No pattern...it just happens. I definitely don't worry about it any more.

New2Tregs · Jul 6, 2020

My '11 does it also. No rhyme or reason to it. Does it so infrequently that I never worried about it.

Brake pedal firms overnight

seafarer28

hedditch

seafarer28

Chris Anderson

yrktreg

seafarer28

Matthew Nelson

jbarrakdickey@gmail.com

Chris Anderson

New2Tregs

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