BMW 2011 335i coupe hissing noise exhaust
Recently I purchases a 2011 BMW 335i coupe and during the idle....I notice a low
hissing noise coming from my rear left exhaust. Is this normal or any guess why it
would do this? The car is under warranty but before I bring it in I like to pin point the
issue so they don't give me the run around. Any one experienced something similar?
Thank you all.
There is a vacuum line goes there, there is a flap in the muffler that supposed to make car more quiet. My guess is either flap doesn't close the way it should or the line that goes to the flap is damaged.
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