Jan 17, 2023 · You need to replace the telematics control unit battery...about $60 online. Links of relevant pages attached. If you have a 2016 340i and don't find the telematics control unit in the trunk under the floor, then it's probably in the headliner like mine. https://www.realoem.com/bmw/enUS/sho...40#84106836777

Apr 3, 2024 · Water leak from the shark fin cover on the roof into the telematics control unit (TCU) causes damage to the TCU then leads to the warning sign of "emergency call malfunction" as well as lost of navigation is not uncommon among G05 X5. For me this is the second time I had to replace the TCU.

Jan 19, 2021 · The issue I've run into is that in the F36 the TCB is not in the trunk where it would be usually found in the F32 and while the diagram shows the TCB is in the roof there's no panel in the headliner to remove and access it.

Jan 10, 2023 · The TCB was not communicating. They water tested the vehicle and found no water from where the TCB sits. Plug connections were dry, and the fuse was not blown. They disconnected the TCB, removed the battery and reset the …

Dec 16, 2022 · The info I found seemed to all zero in on the Telematics Control Unit/Module/Box (TCB). The next morning the battery tender showed green status and car started up fine for trip to dealership. Emergency call system malfunction chime/bong every few minutes for ~45 minute drive to the dealership.

Sep 27, 2021 · It's a rechargable LiIon battery located in the roof telemtry module below the antenna. BMW repair instructions requires all side pillar trims and the headliner to be removed. Ask the dealer for a goodwill request at BMW If the car is out of warranty. Last edited by Ravenous666; 09-27-2021 at 12:24 PM..

Genuine 84106836777 Telematics Control Unit fits 2010-2020 BMW models. BMW Parts Deal offers 84-10-6-836-777 for $665.85.

Nov 25, 2022 · My 2018 640i GT has the dreaded "SOS system failure" message and my dealer said theTCB battery needs to be replaced at a cost of $1200. Is anyone familiar with the location of the TCB in the 2018, 640i GT? I was lucky that my car was still under warranty when this message came up and I got it replaced.

Genuine BMW TCB Telematics Control Unit Module Accumulator Battery. Part number: 84102447710. 2 Year Warranty. As fitted to the below models; 1 Series - F20,F21,F40,F52. 2 Series - F22,F23,F44,F45,F46,F87. 3 Series - F30,F31,F34,F35,F80,G20,G21,G28. 4 Series - F32,F33,F36,F82,F83,G22,G26. 5 Series - F90,G30,G31.G38. 6 Series - F12,F13,G32. 7 ...

Nov 21, 2024 · How to Troubleshoot BMW TCU Telematic Control Unit; Symptoms; How to Diagnose BMW TCU Module; What you will need; Procedure; Buy the BMW TCU module