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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > SOS Call System Failure (PLEASE help!)
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      12-04-2021, 07:44 AM   #1
simplyeric
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SOS Call System Failure (PLEASE help!)

Hello everyone. I just got this "SOS Call System Failure" message on the dashboard and headunit. This is scaring me because the car is only 3 years old.

I currently drive a 330i f30, year 2018.

The only modifications/tuning I have done was adding an amplifier to the car for the audio system, which has been running fine for the past two months, replacing the stock amp. I feel like this may be the only issue that may have caused this error message?

I also have upgraded to an M Performance Exhaust. Highly believe this wouldn't be an issue.

I have gone through the error list on BimmerCode if that can be of any help.

Thank you.
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      12-04-2021, 08:11 AM   #2
Billfitz
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      12-04-2021, 06:34 PM   #3
xlugoz
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Quote:
Originally Posted by simplyeric View Post
Hello everyone. I just got this "SOS Call System Failure" message on the dashboard and headunit. This is scaring me because the car is only 3 years old.

I currently drive a 330i f30, year 2018.

The only modifications/tuning I have done was adding an amplifier to the car for the audio system, which has been running fine for the past two months, replacing the stock amp. I feel like this may be the only issue that may have caused this error message?

I also have upgraded to an M Performance Exhaust. Highly believe this wouldn't be an issue.

I have gone through the error list on BimmerCode if that can be of any help.

Thank you.
I'm going to guess this is an issue with the telematics box (TCB) located in the trunk, by the rear fuse box, could be an electrical issue there. I had this issue when I spilled liquid in my trunk causing it to seep through the carpet and damage this box, I had this same error message for weeks until I diagnosed it, replaced the box and the issue was fixed. Check to see if this area is damaged, if not could be a different fuse issue.
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      12-18-2021, 01:02 PM   #4
Jamie225
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Most probably the TCB emergency battery, easy to get to and replace. Just under headlining by high level brake light
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      12-18-2021, 04:30 PM   #5
pjkbrit
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Battery above rear brake light…$115 from dealer plus search forums for instructions. My 2018 340 just did same… weeks out of warranty
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      02-12-2022, 02:46 PM   #6
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Quote:
Originally Posted by Jamie225 View Post
Most probably the TCB emergency battery, easy to get to and replace. Just under headlining by high level brake light
That's the most likely root cause. Easy to replace.
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