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Old 11-13-2012, 08:57 AM
KenWilk KenWilk is offline
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Location: Dallas, TX
Join Date: Oct 2012
Posts: 4
Mein Auto: 2006 525i
SOS Call System Malfunction

My problem finally solved. I took my 525i to an independent repair shop and in 1 hour they determined thru a diagnostic check that the Telematics Control Unit (TCU) was bad. After it was replaced everything works fine, including blue tooth. The TCU is an amplifier looking box located in the left rear of the trunk. It was easy to remove & replace.
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