BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > Auto Start Stop puts gear to Neutral
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      08-22-2022, 08:10 AM   #1
dorgo
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Auto Start Stop puts gear to Neutral

Hello everyone, I have a little issue with one of our cars, F20 2016 N13, ~80K KM on the clock.
The car is regularly and on-time maintained on BMW dealership and in a very good condition.
I used to have some rattle/shake issues when the engine turned off because of the ASS (Auto Start Stop) action but it got worst.

When driving the car with ASS, before the engine turns off (automatically, when fully stopped) the engine shakes and sometimes the gear goes from Drive to Neutral, this gear change never happened and it accompanied with an i-Drive message that there is a risk to roll because the car is in Neutral (no error/fault message appears).

I went to BMW dealership and I was told that the gear needs to be replaced.
When we turn the ASS off the car goes fine with no issues. Until this escalation (gear goes to Neutral) the engine rattle/shake before ASS-engine-shutdown was reported to the dealership (during the car's warranty period) and they didn't find any issue with it.
I was not told there is an issue with the gear liquid (there are no oil leaks at all), the gear oil was never changed.

Has anyone here ever faced this issue? I tired to look for such threads but couldn't find any.
Has anyone replaced a gear because of something similar?

Thanks!
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      08-22-2022, 08:47 AM   #2
No one
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Hello,

I don't think anybody makes use of the ASS here. Only you. People were only concerned how to turn it off once and forever, I recall.

Regarding your issue, to me it looks like you need a new ASS rather than a gearbox: I would guess the gearbox goes to the neutral to prevent the engine from "choking".
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      08-22-2022, 10:34 AM   #3
dorgo
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Hi,
Regarding the ASS, if the gearbox appears to have no issue then I will simply code the memo-button.
I wanted to know if anyone encountered a similar issue with the gearbox (that's the main pain..).
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      08-22-2022, 10:53 AM   #4
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From your description you only have an issue with the ASS. Stop using it and drive "happily ever after".
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      10-16-2022, 11:16 AM   #5
BMWFans21
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Quote:
Originally Posted by No one View Post
From your description you only have an issue with the ASS. Stop using it and drive "happily ever after".
try to check your battery main battery.
Put a new one, program it and check.
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