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      04-28-2012, 11:03 PM   #6
Elk
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Drives: 2012 335i
Join Date: Apr 2012
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Posts: 1,275
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Direct injection requires very high pressure in the fuel rails. The ticking sound is the injectors supplying fuel.

It should not idle rough, although the sound is not pretty. If you are concerned, go to the dealer and listen to another similar car to be sure everything is OK.
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