nope, I think it's isolated to the bluetooth (tcu) module....but now you're making me want to check if it's actually 73 or 74.
Point being...no TCU, no battery drain.
If it's the TCU, some people have gotten a free replacement since it would interfere with BMW assist. I haven't taken mine in to see what they will say yet. If they won't exchange it, i'll eventually do it myself.
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2005 x5 4.4i sport
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