I don't think a leak coming from the air box would be considered a vacuum leak. A leak in that area means just less air going into the fuel mixture. I wonder if that dumb mpg gauge works off a vacuum, like in the older cars. If I decide to get it fix, I will probably give the job to the stealership since I have a good relationship with the SA. He charges high, gives me a discount thinking I got a good deal.
Originally Posted by goosefoot33
Or you could check your intake elbow and bellows after the air box, and if the leaks aren't there you could do the same smoke test at an indy for half the price of the dealer...
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Last edited by Dave 330i; 09-04-2012 at 04:49 PM.