120 Msport Stop/Start not working?

wilber

wilber

wilber

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Wales
The Mrs bought a 120 msport a few months ago.

However it seems the stop/start does not kick in what so ever.

Does anyone here know of any issues with this tech and possible solutions?

I have checked all the fuses and they are OK.


It's also due a service. Anyone have a rough idea how much this should be with BMW?

Cheers folks
 
The Start/Stop only works under certain conditions.

If the car engine is cold then it doesn't engage
If the outside temp is colder than +/- X of the set interior temp then it doesn't engage.

Plus some more.

Google is your friend :)
 
Yeah i have Googled. But i believe there to be a fault. Its not once kicked in and Mrs drives 40 miles one way to work plus driving to visit client's and properties from there so its getting used a lot.

The car has been owned a few months now so has been used in all sorts of weather conditions.
 
Copied from here:

Start stop will not activate if any of the below apply:

a) Outside temperature is below 37F (3C)
b) Outside temperature is above 95F (35C)
c) Car interior has not yet cooled or wamrd up
d) Engine not yet warmed up
e) Battery charge low
f) Directly after car was driven in reverse
g) Stering wheel is turned after car has stoped
h) Stop and Go traffic ( At least three stops made in short succession at a speed of less than 25 km/h/15 mph )
i) Gear selector in Sport or Manual
j) ABS was activated before stopping
k) Windshield is fogging up

Quite a few innocuous things like moving the wheel or having the aircon and heating on could stop it activating. Also, I've seen a few posts suggesting that it is very fussy about the condition of the battery.
 
My sister has this same issue with her 120d, it never engages but there's no fault according to her local dealer who have checked the stop / start three times now, she has owned the car from new and they say it's down to her driving style, she has the same issue with the 520d courtesy car she often has from them too, yet the stop / start on her husbands Audi A5 works for her perfectly as you'd perhaps expect, without any of these parameters it appears.
 
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Lashout_UK said:
May be what the driver's doing but it'll only work if you put the car in neutral and take your foot off the clutch.
Click to expand...
If I recall it works when you put your foot on the clutch in 1st when stopped, I only had a manual as a lend before mine arrived but i'm sure it didn't just stop when you put it in neutral.

fwiw I don't think it works well at all on the manual, on the auto box it works quite well, the only time its a pain is as you approach a junction / roundabout and your feathering the brake, about to gun it and it decides now is a good time to auto off :o
 
wilber said:
The list does seem a bit silly but i find it hard to believe it is not faulty as it should have engaged at least once with the amount miles she does.
Click to expand...

Seems to me that the list is actually very sensible and well thought out. How long are the trips your girlfriend does?

The main reasons why the Stop/Start be not working are:

- Battery is on its way out
- Temperature sensors are reporting incorrect temperatures
- Engine isn't warming up, either due to fault in cooling system or because your girlfriend isn't doing long enough trips.
 
A lot of people have the habit when stopping at lights of just holding the clutch down and keep it in gear rather than put it in neutral and clutch released. In that case it wont active because the clutch is down.
 
peige said:
If I recall it works when you put your foot on the clutch in 1st when stopped, I only had a manual as a lend before mine arrived but i'm sure it didn't just stop when you put it in neutral.
Click to expand...
Like Lashout said - in a manual BMW 1 Series you need to put it in neutral with no clutch to activate SS.
 
...and there's me wishing I had a way to turn off stop/start on my car permanently rather than each time I start it.

The times its turned off just as I get a gap and put my foot back down (auto) or need to do a quick start from stopped are annoying. So although I like the benefit on longer stops, on balance I leave it disabled.
 
[TW]Fox;27333640 said:
Why does it?
Click to expand...

pepsilol said:
Seems like a very reasonable list to me.
Click to expand...

The list in the handbook was even bigger if i remember correctly, I remember thinking at the time that the whole thing seemed pointless.

Lashout_UK said:
May be what the driver's doing but it'll only work if you put the car in neutral and take your foot off the clutch.
Click to expand...

I have driven it myself with all these things in mind hoping to see it happen but with no luck.

Gaygle said:
Seems to me that the list is actually very sensible and well thought out. How long are the trips your girlfriend does?

The main reasons why the Stop/Start be not working are:

- Battery is on its way out
- Temperature sensors are reporting incorrect temperatures
- Engine isn't warming up, either due to fault in cooling system or because your girlfriend isn't doing long enough trips.
Click to expand...

as stated she does 40 mile trips one way to work through towns and all twisty slow A roads with plenty of traffic lights.

I'm guessing it's something with one of the bottom 3 you have listed.

The car's going to BMW for a service in the next couple of weeks I'll get the battery tested as i did not really want to fork out £90 an hour for a fault investigation.
 
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