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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > BMW Coding > bluetooth constantly dropping

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      03-13-2015, 08:57 AM   #1
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Drives: e92 335
Join Date: Feb 2014
Location: turkey, ankara

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bluetooth constantly dropping

Hi people, after all 3 months, trying everything, I gave up but last time I want to try my chance on here by asking your precious ideas. My car (E92 335i 2007) factory fitted CCC. We made CIC, Combox retrofits, first time I deal with a guy from Spain for remote coding. He made all necessary coding except combox features (bmw live, internet, album art, office etc) CIC, TV, combox's Bluetooth were working without any issue, he could not complete coding of combox features because he said need CIC firmware downgrade for that features and its risky. After a few months later I contact with a guy from USA and he said its possible to activate combox features without downgrade CIC. After our first appointment & coding with him, bluetooth could not work properly. The problem is:

I can easily connect between car and iphone BT, asking 4 digits and connect very fast its OK. But when I enter phonebook list, sometimes a few minutes later its complete transferring my contacts from my phone and then suddenly disconnect-lost bt connection, or sometimes in next a few seconds connection drop, and if once time it drops then never can not keep connection stable, constantly connect and disconnect. If I never try to sync my contacts or recall list, then connection never drops.

We tried everything we can; updated IOS software (it was already latest ios version), updated combox firmware, flashed combox, reset to factory default, I changed all special Turkish characters to English characters on my phonebook, reboot CIC, tried another phone (iphone 6, 5s, android etc), deleted devices on both of cic and phone bt list (thousands time)...

Cause of this disconnect problem, I can not use internet function also, its very annoying.

I thought maybe someone have an old experience about kind of this issue ?

Im adding my trc & FA files on here, please help me guys ...
Attached Files
File Type: txt E89-CIC.C1A-NETTODAT.txt (2.2 KB, 4 views)
File Type: txt E89-CMEDIAR.C05-NETTODAT.txt (376 Bytes, 4 views)
File Type: txt fa.txt (235 Bytes, 4 views)
Appreciate 0


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