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There is a vacuum line at the rear of the intake manifold for the brake booster (on a 2.0) thats a rubber vacuum hose connected to a plastic hose thats routed over to the brake booster. You dont have to take either off to do a w-pump or thermostat unless the intake manifold is removed whice was problably done if it was a beetle. They might have forgot to re-install the vacuum lines properly.???
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