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Old 09-18-2018, 02:18 PM   #2
78F350
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Join Date: Jul 2014
Location: Oklahoma
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One of my Cayennes had a leak in the brake booster vacuum hose. I have not heard of it being a problem with the Boxsters, but turns out that it's pretty common in the early Cayennes. Take a good look and listen up front around the brake booster, especially near where the hose bends.
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