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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > Bluetooth retrofit

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      03-23-2017, 08:56 PM   #1
Second Lieutenant

Drives: 13 328i xDrive
Join Date: Mar 2017
Location: TN

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Bluetooth retrofit

So I have an 09 328i with the professional radio. My Bluetooth system seems weird to me.

1) the mulf/tcu system is different. I bought the tcu to retrofit the Bluetooth and didn't realize I had the mulf system in the back, and the wires don't connect to the tcu.

2) I also have stock USB /aux if it makes a difference

3) and today I took down the overhead console to checkout the microphone and I could not find the wiring for the mic to save my life

Appreciate 0


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