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I drive a 2011 328i... Over the past couple of weeks, I have started to feel a hard "thump" when the car is sitting still. Wondering if this could be the AC clutch, tranny, or something else. Car currently has 93k miles.
 

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I drive a 2011 328i... Over the past couple of weeks, I have started to feel a hard "thump" when the car is sitting still. Wondering if this could be the AC clutch, tranny, or something else. Car currently has 93k miles.
That covers it....

Dude/Dudette!
Not much to go on ---> Find where sound's coming from. May as well start with transmission.
 

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My stab in the dark is warped crank shaft pulley.
 
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