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Discussion Starter · #1 ·
I have a 2008 turbo. Anytime the gas is below about 1/2 tank, the sound of liquid sloshing about is quite loud in the cabin. The sound emanates from below the left rear seat. It is loud enough that new passengers always ask about it. It is most audible in slow, stop and go traffic.

Is this a unique issue with my Cayenne or is this common?
 

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Discussion Starter · #2 ·
I eventually figured out that the problem was rainwater accumulated in the rocker panel. According to my dealer, the drain holes in the rocker panel are too small and can clog. My turbo has the factory offroad guards and they have to be removed to access the drain holes. The dealership wanted over $500 for the job! After some balking on my part, they agreed to do it under warranty.
 
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