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Originally Posted by UCrewX5
First thing you need to do is check to see if the TCU is even installed. It should be located in the left rear electronics bay, down in to lower well area.
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Ok, I took this to the dealer (BMW). They brought it into look at the vehicle (spent 15 - 20 minutes). It in fact has the TCU (I saw the picture someone posted and yes, it looks just like that), the manager said they tried a "hard reset" on the TCU and still could not solve the problem and want the vehicle for the day to resolve the issue -- he stated that sometimes the TCU needs to be recoded.
I suspect he knows more about this than I do. My feeling is that the prior owner had BMW Assist, let the subscription run out thus disabling the TCU unit in the car, which requires the dealer to go in and do *something* to solve the problem.
However, I'm skeptical. I'm afraid that this is basically a "reset" someplace and I'm going to pay $500 to fix something that is going to be nothing more than a couple minutes of work.