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FYI. Now the problem is solved by Porsche center. It costed me 600$. They changed pipesection Pipesection 1 95535557951 ( in the order they said 47761900-42) It looked very fresh, but obviously there was a leak. If you don't have a clue - I would try to change this myself since (and then leave to Porsche center if its not the solution): 1. it is fairly easy to replace 2. It is more likely that this part is broken - due to the heat.
Thanks, then I know it is normal with a hot pump. Either way it will be expensive. I could easily change the pump but change the pipes looks complicated (pulling off wiper arms and so on) Still i don't know the exact fault. Pipesection 1 95535557951 147 $ Pipesection 2 95535557751 233 $ Electric vacuum pump 95535561702 247 $ Sum about: 600 $ I have booked a repair (fault find) at Porsche Center in Stockholm. The problem is tha
I also get a "Brake Booster Faulty" on my Cayenne 2005 (V8 Turbo) . I took off the plastic shields and checked for breaks on the pipes. Everything looks OK (very fresh). Everything is exactly as Ciaka describes - OK. A also checked the connection quite carefully that he (and Davidoff) had problems with and it looks OK. But one strange thing: My vacuum pump is hot. It works and goes on when pushing the break pedals, but it is hot. Is that normal? (It is working, Could it be breaking down?)