MDCT Stalling: How many?

[armyav8tor]

1) No
2) N/A
3) N/A

[///M3Power]

I have a 09 and never had this issue, looking at the replies it looks like you're the only one experiencing it. Why not take it in and having them look at it. You may just be experiencing an actual issue.

[skierman64]

8 months, 8500 miles, original software, zero stalls. 99% of driving in the S mode.

[Zed]

Originally Posted by ///M3Power

I have a 09 and never had this issue, looking at the replies it looks like you're the only one experiencing it. Why not take it in and having them look at it. You may just be experiencing an actual issue.

Not many replies because this issue has been discussed, complained about, etc. in many other threads. I also have an 09... it happens to me all the time in D modes... rarely in S ones. Fairly easy to reproduce in D2. Approaching corner in 4 or 5, brake, turn... car has downshifted to 2 ... push on gas... nothing... nothing... VROOOOM. Not good.

[skierman64]

Are we talking about the engine actually stalling or just a delay in acceleration because the transmission is changing gears?

[Radiation Joe]

This was my fault for calling this delay 'stalling' in the beginning of the thread. We are definitely talking about a transmission issue where it either doesn't select a gear or the clutch delays engagement. Either way we are left (typically in an intersection) with no power for a second or two.

[sard]

My wife was driving the car and from a stop, driving across an intersection she said the car "stalled" .. as in it wouldn't move forward and jerked. She was in D3 mode. As the car reached the other side of the street it went back to normal. Anyone know if BMW knows of this issue?

[alpinecoupe]

I just dropped off my 2008 coupe an hour ago at the dealer for the 08V-595 software recall.

I have approximately 4200 miles on my car and have not had any problems to date. FWIW I virtually NEVER run in D mode, preferring to manually select the ratios.

I will post after I get the car back and put some miles on it to report if I notice any changes in operation or performance

AC:

[Roadkiller]

I've noticed this "stalling" issue and will try to replicate it later. I initially thought the cold weather had something to do with it but seems it does not matter how cold it is....it happens.

[alpinecoupe]

I had the factory recall software installed a week ago.
According to the recall notice the defect could potentially cause the transmission to skip gears during rapid deceleration e.g. going from 5th to 2nd, causing an engine stall. No mention was made of stalling under acceleration in the recall notice I received.

First impressions: Shifts felt a bit smoother. However, since that time I have had two experiences that have me concerned.

One sounds like some of the posts here. I was in 2nd gear, mildly accelerating and the car hesitated. Not a stall, but it felt as though I had taken my foot off the accelerator for a moment. Very odd.

The second occurred several nights ago. I was driving down a parking garage ramp in 1st gear. The car started "bucking" like you would expect if you had a manual and were in too high a gear i.e. lugging the motor.
I gave it a little prod on the pedal and it went away. This has NEVER happened before.

Still need more time but suffice to say I am not feeling 100% confident that this issue has been addressed.

Not to sound completely paranoid, but part of me pictures my car sitting outside the dealership for several hours after I drove off in the loaner car.
That is to say, they just parked it and told me they installed the new software. Man, I hate this feeling.

AC

[M2MG17]

I have the same issue on mine.

[mkoesel]

Originally Posted by alpinecoupe

The second occurred several nights ago. I was driving down a parking garage ramp in 1st gear. The car started "bucking" like you would expect if you had a manual and were in too high a gear i.e. lugging the motor.
I gave it a little prod on the pedal and it went away. This has NEVER happened before.

This is nearly certain to be a manifestation of the "1st gear accelerator pedal oscilation" syndrome that often effects manual (and DCT) drivers when in low (usually first) gear. The fact that you were driving in a garage makes it even more likely since you'd be more likey to be driving with very little throttle applied and then do an acccidental sudden jab.

Not to sound completely paranoid, but part of me pictures my car sitting outside the dealership for several hours after I drove off in the loaner car. That is to say, they just parked it and told me they installed the new software. Man, I hate this feeling.

Were you going from 31.1 to 31.2 or were you going from 31.0 to 31.2? That is, did you have your software updated previously, within the past month or two? If you didn't then you should notice a huge difference in shifts in S6 mode. Shifts should now take place nearly as you pull the paddle instead of occuring after a fairly large delay.

[ase2dais]

I have a mid-oct built not affected by the recall, I miss it by a couple of days.
The car has 1200+ miles and soon to be service, and I havent had any experience with the problems posted here.

I do 50/50 manual/Smode, and last wkend had a long 200+ trip to Richmond and back. Its flawless, first time I've stretch it pass 100.

Sweet!!!
I foreseen no issue after the service since no software update is needed.

I love this car!

[alpinecoupe]

Originally Posted by mkoesel

This is nearly certain to be a manifestation of the "1st gear accelerator pedal oscilation" syndrome that often effects manual (and DCT) drivers when in low (usually first) gear. The fact that you were driving in a garage makes it even more likely since you'd be more likey to be driving with very little throttle applied and then do an acccidental sudden jab.



Were you going from 31.1 to 31.2 or were you going from 31.0 to 31.2? That is, did you have your software updated previously, within the past month or two? If you didn't then you should notice a huge difference in shifts in S6 mode. Shifts should now take place nearly as you pull the paddle instead of occuring after a fairly large delay.

There is no mention of the codes you list above on the service report.
The only number is SI B28 06 08: Trans Control Module Reprogramming
Maybe this is a dealer service code.
The upgrade was done on 12.0.08, earlier this month.

It sounds to me like there are a variety of "issues" going on, not just one.
I do not recall experiencing any lag when using the paddle shifters, although I typically use the console shifter in S mode.

We have had snow for a week so the car has not been out of the garage for more road testing.

AC

[newtom3]

just got out of 1200 mile service yesterday on an Sept build of 09 E92... nothing done in terms of firmware update.

[allankru]

I've got a 2009 M3 Sedan that has the same problem. If I decelerate, into a turn for example, and then TRY to accelerate the car hesitates noticably. Since I just got my M3 a couple of months I would assume I have the latest software updates. Anyone know how I can check what version of SW I have installed?

[baarii]

My stalling increased with the new software.
5k miles '08

[Labrada_Exoticz]

my car stalled about 3 times when I 1st got the car in august but never happened again. BTW i have the 1st update.

[waremark]

My car was May production, June delivery, and now has 11,000 miles. It has never stalled, and manual changes were always very quick. The only issue the DCT had was that it refused to change down under maximum braking - I experienced this repeatedly at a track day.

I have now had the software upgrade to v 31.2, and am still not experiencing problems.

I asked my dealer how many other customers have had problems with DCT. Simple answer - zero. No other customers of this large dealer have mentioned DCT problems, either before or after the software upgrade.

I only found this forum because I googled 'DCT Software Issues'. Are there thousands of happy DCT drivers out there, and only the ones with problems find their way here? What do people think?

[dermbmw]

I've had the transmisssion reprogrammed because of the recall and still have the exact same problem as Zed and allankru. The car is often completely unresponsive for 1-2 seconds after decelerating around a turn and then VROOM. This leaves me like a sitting duck, helpless in the intersection against approaching traffic. The National Highway Traffic Safety Administration ( nhtsa.gov) logs such defects and can mandate a recall. I suggest notifying them now while working with your dealership to correct this safety issue.

[Davo2003]

Originally Posted by dermbmw

I've had the transmisssion reprogrammed because of the recall and still have the exact same problem as Zed and allankru. The car is often completely unresponsive for 1-2 seconds after decelerating around a turn and then VROOM. This leaves me like a sitting duck, helpless in the intersection against approaching traffic. The National Highway Traffic Safety Administration ( nhtsa.gov) logs such defects and can mandate a recall. I suggest notifying them now while working with your dealership to correct this safety issue.

Yep, just read my post on page one.

[boynbeagle7]

I really hate that bucking sensation you can get when you're in S1 after slowing down- it looks to others like you don't know how to handle your car.