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Q4 Viscomatic pressure akkumulator

Posted: Mon Aug 28, 2023 7:15 pm
by alfisty
Hello everyone
My Q4 had the problem that the four-wheel drive light came on after about an hour of driving.
Error "Hydraulic pressure, fluctuation too large"
This error then appeared more and more frequently. First I changed the oil and also cleaned the rear filter element. Finally, I replaced the accumulator.
I took the FEBI BILSTEIN 01817 pressure accumulator. This is used in brake systems from e.g. BMW with hydraulic brake boosters. The part fits 1:1.
Now the problem is fixed.

Re: Q4 Viscomatic pressure akkumulator

Posted: Tue Sep 12, 2023 7:49 pm
by Alfan
That is great parts info, thanks for posting this 👍

And also great that you solved the problem 8)