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I pieced this kit of OEM parts together myself to try and retrofit Bluetooth to my 135i. Included is a used TCU (84.109149615-02), new Bluetooth antenna (6928461-00), new antenna mounting bracket (6912160), new cupgraded Hands Free microphone (84316938762), new voice command bypass jumper (693755901) and a used overhead switch panel unit including the Assist switch (6932827).
This *should* be everything needed to retrofit Bluetooth to an E90 or later chassis (and likely any others that use the MOST bus). However, I was NOT able to get it working on my 135i. I may have screwed up the swapping of the MOST cables, or the TCU may need programming. Also, I have been told that this MAY be a Euro TCU. Either way, I am giving up and sticking with a headset. This is a great deal for just the overhead switch and antenna.
NO WARRANTIES OR GUARANTEES OF FITMENT ARE EXPRESSED OR IMPLIED. I *think* everything is here, but it is possible another part may be needed. Do your research, there are dozens of threads on this subject including:
http://www.e90post.com/forums/showthread.php?t=3540
Note: the overhead switch panel is from an E90 3-Series. The grey color is *slightly* different from that of the grey on the 1-Series.
All together, these parts have a retail of over $900. SOLD