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      01-31-2018, 11:27 PM   #1
daltonnthomas
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07 SOS Failure but everything still works

Hello,

My 2007 328xi SOS Failure light came on yesterday while I was driving and it has not gone away. All of my features seem to still work perfectly fine, radio, aux, bluetooth... not sure what to do from here, but it is really annoying having that warning come on every time I get in the car.

Any advice or suggestions on this?
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      02-01-2018, 12:48 AM   #2
ctuna
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Since BMW isn't supporting SOS in the E90 anymore you
could have it programmed out.
My has triggered a few times but it went away and never came
back.
Make sure you have a good battery .
You might try reseating the connectors as the TCU or Mulf.
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      02-02-2018, 09:43 PM   #3
daltonnthomas
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Quote:
Originally Posted by ctuna View Post
Since BMW isn't supporting SOS in the E90 anymore you
could have it programmed out.
My has triggered a few times but it went away and never came
back.
Make sure you have a good battery .
You might try reseating the connectors as the TCU or Mulf.
So it hasn't gone away at all. It is still there every time I drive the car. But now I am having a warning come up saying that the passenger airbag is failed too. But after driving for probably 10 minutes or so, it goes away on it's own... but that warning only appears every so often, not each time I get in the car...

Any idea what could be causing these? Friend had suggested a weak battery?
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      02-02-2018, 09:51 PM   #4
ctuna
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First thing is you better check your resting battery voltage
and your alternator output voltage.
Weak battery's or low voltage from the alternator can cause
all kinds of havoc with these cars.
And I already suggested that.
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      02-14-2018, 02:50 PM   #5
daltonnthomas
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Quote:
Originally Posted by ctuna View Post
First thing is you better check your resting battery voltage
and your alternator output voltage.
Weak battery's or low voltage from the alternator can cause
all kinds of havoc with these cars.
And I already suggested that.
So I ended up taking it in. They tested battery and alternator and told me that they were both fine. They couldn't figure out why that code came up so they reset it and it has been fine since. Weird.
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      02-14-2018, 05:10 PM   #6
ctuna
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It's good to have a coding setup to be able to reset
these errors yourself.
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