Manzato

In my case the problem happened after fluid change, my car is Cayenne S V8 2012.

But the failure behavior is a little different, it never happened when the car was running or driving. My problem happens after park the car and leave it for a few hours and always in a very hot situations.

I'm trying to understand the problem. I'm going to do some tests and replace the fluid again, using Motul RBF 700. As soon as I have an update I'll post the results to help other owners with this same problem.

garrett376

Unless you just have nothing else available, RBF700 would be a bad fluid to try to use on a Cayenne that you change fluid once every two years.

Manzato

Thank you for your feedback. Do you mean in relation to price or technical specifications?

garrett376

It picks up moisture too quickly which in turn lowers its spec/performance, which is fine for a car that gets its brakes frequently bled like a track car, but not a favorable attribute for a Cayenne getting its fluid changed every 2 years.

T2SYY

My first really hot day since owning the car and my break pedal is doing the same. Absolutely fine in normal weather and over a 4 hour drive. It is also making my auto box gear changes very odd