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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > M Series > E90/E92/E93 M3 (2008 - 2014)

E90/E92/E93 M3 (2008 - 2014)
4th generation E90 M3 sedan, E92 M3 coupe and E93 M3 convertible. The last of the naturally aspirated M3s, powered by a 4.0 liter V8 making 414hp and 295 lb-ft of torque.

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  #1  
Old 03-26-2012, 04:34 PM
Slave2Miles Slave2Miles is offline
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Mein Auto: 2011 E92 M3
Auto start / stop not working

Not that I really care that much, but my Auto start / stop has never seemed to work. Is there anything I need to do other than turning it on to make this feature work? My car is a 6sp so perhaps that has something to do with it.
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  #2  
Old 03-26-2012, 05:20 PM
ksoze ksoze is offline
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According to the BMW web site, "The Auto Start Stop function automatically switches off the engine when the car is at a standstill and in neutral, then restarts it as soon as the driver presses the clutch pedal again."
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  #3  
Old 03-26-2012, 05:57 PM
logicalthought logicalthought is offline
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Quote:
Originally Posted by Slave2Miles View Post
Not that I really care that much, but my Auto start / stop has never seemed to work. Is there anything I need to do other than turning it on to make this feature work? My car is a 6sp so perhaps that has something to do with it.
Just FYI, the default setting is "off," which is the state it's in when its little switch on the dashboard is lit. I leave mine off because I suspect that the constant stop-start could prematurely wear the battery and maybe even the starter. Eventually, this will be handled by either a second, designated battery or an ultracapacitor, but I don't think the system on the M3 has either of these.
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  #4  
Old 03-28-2012, 12:22 PM
Jamze132 Jamze132 is offline
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The system isn't operable unless the engine has reached operating temperature and it's above 37f I believe. I might be off base here...
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  #5  
Old 03-28-2012, 12:45 PM
solstice solstice is offline
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I tried it twice by just pushing the button. It works and I hated it. Thanks BMW for making it off by default, please do the same on the new M3.
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  #6  
Old 03-29-2012, 05:39 AM
335i 335i is offline
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Originally Posted by solstice View Post
I tried it twice by just pushing the button. It works and I hated it. Thanks BMW for making it off by default, please do the same on the new M3.
I've used it on occasion in heavy traffic where there are longer periods of not moving. Also works well in a drive thru when there is a heavy wait, but I don't use it daily. I can appreciate it in those special circumstances, but don't have a need for it daily.

FYI, it will automatically start the car up/not engage if the heat/air varies from the auto-climate setting (AC needs to kick on, etc.).
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Last edited by 335i; 03-29-2012 at 05:40 AM.
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  #7  
Old 03-29-2012, 08:31 AM
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NASA43 NASA43 is offline
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I had no idea they implemented the Start/Stop feature on the M3.
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  #8  
Old 03-29-2012, 08:41 AM
ksoze ksoze is offline
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Quote:
Originally Posted by NASA43 View Post
I had no idea they implemented the Start/Stop feature on the M3.
The good news is that they defaulted it to OFF, unlike the F10 which defaults to ON and needs to be switched off at every start-up.
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  #9  
Old 04-12-2012, 10:08 PM
MRV99 MRV99 is offline
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Quote:
Originally Posted by logicalthought View Post
Just FYI, the default setting is "off," which is the state it's in when its little switch on the dashboard is lit. I leave mine off because I suspect that the constant stop-start could prematurely wear the battery and maybe even the starter. Eventually, this will be handled by either a second, designated battery or an ultracapacitor, but I don't think the system on the M3 has either of these.
The auto start/stop does not use the started to restart the engine. The engine uses itself to start the engine and is done by sparking a compressed cylinder. Read up on it, pretty neet
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  #10  
Old 04-13-2012, 04:36 AM
logicalthought logicalthought is offline
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Originally Posted by MRV99 View Post
The auto start/stop does not use the started to restart the engine. The engine uses itself to start the engine and is done by sparking a compressed cylinder. Read up on it, pretty neet
Where did you see this? In a quick Google search re how it works, all I can find is this, which clearly references the starter:

"The Auto Start Stop function is coordinated by a central control unit that monitors data from all relevant sensors, the starter motor and the alternator. If necessary for comfort or safety, the control unit will automatically restart the engine: for example, if the vehicle begins to roll, the battery"

http://www.bmw.com/com/en/insights/t..._function.html
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  #11  
Old 04-22-2012, 05:29 AM
TqIsQuick TqIsQuick is offline
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Quote:
Originally Posted by MRV99 View Post
The auto start/stop does not use the started to restart the engine. The engine uses itself to start the engine and is done by sparking a compressed cylinder. Read up on it, pretty neet
...and there's a little jerk when it comes back to life, it's not compeltely hidden from the passengers. That said, we always turn it off as soon as the car is running. Have had the car for less than two months and can say this is one big BONER of a 'feature'.

My wife drives through a very urban area to/from work each day and is scared to death that the car won't restart one of those times. Aside from the wear and tear factor on the car (and there has to be some), the little lurch is pretty annoying on a $66,135 car (if you forget to turn it off at initial start up). Since it is switched, the switch must a fuse (or a relay) that will disable the feature...there are several fuses attributed to start/stop and I guess I'm just going to start pulling one by one and see if I can isolate where/how the switch is powered.
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  #12  
Old 04-22-2012, 06:22 AM
logicalthought logicalthought is offline
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Originally Posted by TqIsQuick View Post
... we always turn it off as soon as the car is running.... Since it is switched, the switch must a fuse (or a relay) that will disable the feature...there are several fuses attributed to start/stop and I guess I'm just going to start pulling one by one and see if I can isolate where/how the switch is powered.
You shouldn't have to do that, as the default setting every time you get in the car should be "off"; i.e., when the little on/off button is lit (which mine is whenever I start the car-- with the key, of course), the feature is NOT on, and if I wanted to use it I'd have to manually turn it on by pushing that little button and making that light go off. So unless you'd want to try to pull the fuse just because the light annoys you... But, of course, that's why they make black electrical tape!

Last edited by logicalthought; 04-22-2012 at 06:23 AM.
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  #13  
Old 04-22-2012, 07:05 AM
TqIsQuick TqIsQuick is offline
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not on mine...

...well its default is 'on' in our car. Pushing the button to 'disable' the feature illuminates the yellow bar light below the switch. The light is not illuminated and auto start/stop is enabled/fully functional after each time the car is shut down. Maybe as of a certain VIN it's 'always on'?

I'd LOVE for it to be an option to use vs. having to switch it off at every use.

thanks
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  #14  
Old 04-22-2012, 07:12 AM
logicalthought logicalthought is offline
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Originally Posted by TqIsQuick View Post
...well its default is 'on' in our car. .. Maybe as of a certain VIN it's 'always on'?
Wow, that's interesting. Well, my car was build in May 2011... Maybe yours is newer?
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  #15  
Old 04-22-2012, 07:47 AM
kscarrol kscarrol is offline
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Quote:
Originally Posted by logicalthought View Post
Wow, that's interesting. Well, my car was build in May 2011... Maybe yours is newer?
Tq has an F10 535 and I've heard the default is on for the 5 series...
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  #16  
Old 04-22-2012, 07:50 AM
ksoze ksoze is offline
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The F10 defaults to ON, mentioned in several posts up. If TQ has an F10 and is posting here on the M3 board for that info, he is going to get confused.
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  #17  
Old 04-22-2012, 08:19 AM
kscarrol kscarrol is offline
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Agreed but he lists a 2012 535xi as his "Mein Auto"....
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  #18  
Old 04-22-2012, 08:22 AM
ksoze ksoze is offline
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Originally Posted by kscarrol View Post
Agreed but he lists a 2012 535xi as his "Mein Auto"....
The he is "geschraubt" as far as the auto start/stop
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  #19  
Old 04-22-2012, 09:18 AM
TqIsQuick TqIsQuick is offline
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...yes, wrong board. I chimed in as it 'torques' me off I guess. Sorry to poach (and the car is new, new; delivery on 3/3/12).

thanks all -
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  #20  
Old 04-22-2012, 09:34 AM
kscarrol kscarrol is offline
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No worries! Just want to make sure you understood the difference... And I'm with you, would not be happy with the default being on in my car. Surely someone can code the feature to default to off.
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  #21  
Old 04-22-2012, 09:34 AM
ksoze ksoze is offline
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Here is a thread in the F10 forum to get you started:

http://www.bimmerfest.com/forums/sho...ght=start+stop
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  #22  
Old 04-23-2012, 12:04 AM
Jim in Oregon Jim in Oregon is offline
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European M3's default on.
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  #23  
Old 04-23-2012, 07:22 PM
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PhillyNate PhillyNate is offline
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Why on god's green earth, no pun intended, would this feature ever default ON in ANY model or on ANY continent? Just not understanding this company these days.
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  #24  
Old 04-23-2012, 08:04 PM
solstice solstice is offline
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Originally Posted by PhillyNate View Post
Why on god's green earth, no pun intended, would this feature ever default ON in ANY model or on ANY continent? Just not understanding this company these days.
Apparently our beloved representatives has decided that a manufacturer can not use start/stop in their mpg testing unless it's defaulted to ON. Not sure how true this is but that's the rumour. Still, please leave the M cars to default OFF BMW and make up the savings on the non performance models. Actually make the whole function optional on the Ms.

Last edited by solstice; 04-23-2012 at 08:07 PM.
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  #25  
Old 04-25-2012, 05:23 PM
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Kurt_OH Kurt_OH is offline
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2011 E90 M3, delivered Nov 7th, 2011 (Euro Del). Auto start is disabled by default. I've never turned it on, so I can't report on how it works, just that it has NEVER activated in my car.
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