[imoksoami]

Like I and a few others said, a dyno will show the difference between v28 and v29. The '07 has v29 and the '08 v28

"The shop printed a graph with the last (1,300 rpm) pulls side by side. So...is there a measurable difference between v28 and 29.2???? YOU BET!!! At 1,300 the 07 showed 80 hp and 20 lb/ft. The 08 showed 110 hp and 40 lb/ft. Further the v29.2 car showed lower peaks in both areas until about 4,500 rpm at which point the cars evened-out."
http://www.e90post.com/forums/showpo...1&postcount=15

[2e9x's]

Originally Posted by imoksoami

Like I and a few others said, a dyno will show the difference between v28 and v29. The '07 has v29 and the '08 v28

"The shop printed a graph with the last (1,300 rpm) pulls side by side. So...is there a measurable difference between v28 and 29.2???? YOU BET!!! At 1,300 the 07 showed 80 hp and 20 lb/ft. The 08 showed 110 hp and 40 lb/ft. Further the v29.2 car showed lower peaks in both areas until about 4,500 rpm at which point the cars evened-out."
http://www.e90post.com/forums/showpo...1&postcount=15

I was just about to link to my review in this thread. Thanks for beating me to it!

Know that neither of my personal cars has v29.2. I did this comparison so we could hopefully have something to use to SHOW BMW that the phenomenon is real, not just due to "sensitive drivers." I hope it helps!

[shaddai]

URL is broken. I get a page not found.

Found:

http://www.e90post.com/forums/showpo...1&postcount=15

[rlb]

Originally Posted by meyergru

1. Correct. With pre-09/07 cars, basically, it's "choose your poison": Carry on with BMW's software rattle-fix or demand the lag-fix (including rattles). Oh, and by the way, since it is only a cosmetic thing, the latter is not covered under warranty (you know, the "have to understand" part).

2. Yes, BMW actually updated cars between build dates 09/07 and 03/08 to v29.2 and v30.x, for example mine. I assume that those customers can get the lag-fix also on demand at no cost (I will). That is, the "demand" part of the statement does refer only to pre-09/07 owners and actually means "they have to demand the lag-fix explicitly, because normally they get a rattle-fix software.". So, for these owners (including me), everything comes out fine.

3. What they say is that newer cars are unaffected. In turn, this means they will get no fix. Some people here think otherwise about if such cars are affected.

So if I have a 6/07 build, pre 29.2, then I have flawed wastegates? If I develop a wastegate rattle shouldn't they fix/replace the wastegates under warranty? Afterall, they did redesign the wastegates in the 9/07 and later cars. By doing that they are basically admitting there was a problem with the pre 9/07 wastegate hardware.

[aerodyte]

I have a 1/07 built 335i. I can only assume that it is pre 29.2. I've never understood the lag issue. However, tonight after jumping on the freeway with a cold car on a very cold night, I came along a IS-F and was going to race him/her. So when the IS-F tried to pass me, I just floored it. What I felt was the engine just reving and no boost. After about a couple of seconds the boost started to increase. I started out at about 65 mph so it this wasn't a low speed manuver. Is this saying that on a cold car, the wasteages are held open?

[William Blake]

Originally Posted by imoksoami

Like I and a few others said, a dyno will show the difference between v28 and v29. The '07 has v29 and the '08 v28

"The shop printed a graph with the last (1,300 rpm) pulls side by side. So...is there a measurable difference between v28 and 29.2???? YOU BET!!! At 1,300 the 07 showed 80 hp and 20 lb/ft. The 08 showed 110 hp and 40 lb/ft. Further the v29.2 car showed lower peaks in both areas until about 4,500 rpm at which point the cars evened-out."
http://www.e90post.com/forums/showpo...1&postcount=15

The link is dead

Edit: Nevermind

[BmwFanFL]

Quick comment on BMW's more open position..

I wouldn't assume that BMW really sees this as the well defined and bounded situation in the announcement. It is not uncommon for firms to announce a fix much broader than the stated problem/audience, simply to play down how widespread the issue is. They can always say later that the new release "helps with perception of performance in other situations" and keep the original problem officially to a smaller group. As long as they can point to some plausible difference to draw the lines as they did, the PR strategy could be defended [this is hypothetical, but not uncommon].

I see the acknowledgment of the situation and the fix on the horizon as great news. I, personally, wouldn't worry too much if any particular vehicle strictly fits the description. I bet they'll give you the update anyway.

Either the wastegates tend toward open at idle/low-load or they do not (main believed cause of the issue to me -- thanks shiv). If they fix that problem, the bulk of what appeared last march/april should be solved. Whether other issues are at play here, we'll need to wait and see..

Anyway, its extremely promising to have the door of acknowledgment opened.

[Erregend]

Check out first few slides on this page.

http://www.bmwtis.com/tsb/attachments/B061108Slides.pdf


Key point is:"For vehicles produced 09/07 up to
03/08 the new software will be available
via software update on a customer
complaint basis"

Looks like you will NOT have to wait for some other problem to arise.

[midlife]

Originally Posted by aerodyte

I have a 1/07 built 335i. I can only assume that it is pre 29.2. I've never understood the lag issue. However, tonight after jumping on the freeway with a cold car on a very cold night, I came along a IS-F and was going to race him/her. So when the IS-F tried to pass me, I just floored it. What I felt was the engine just reving and no boost. After about a couple of seconds the boost started to increase. I started out at about 65 mph so it this wasn't a low speed manuver. Is this saying that on a cold car, the wasteages are held open?

as i understand it, until a certain oil operating temp is reached (car is cold) boost is limited in (all ??) our cars.

btw, i would never race my car until the oil temp is near or at 120 centergrade.

[mesropb23]

would a 3/07 built 335 be considered 29.2?

[Weaselboy]

Originally Posted by mesropb23

would a 3/07 built 335 be considered 29.2?

No.

[mesropb23]

which ones are 29.2?

[meyergru]

Originally Posted by mesropb23

which ones are 29.2?

That is a very tough question to answer. Judging from how you ask, obviously you have not read the thread. So, from your point of view and according to BMW, the short answer is: none are! At least that is not really depending on build date.

v29.2 has been introduced in 03/08. All (well, most) cars build after that date have MSD81 hardware. BMW says that those cars never had any problem that had to be fixed, so they have v29.2, technically, but for a different hardware, so they should not have lag. Some people think otherwise, despite BMW's claim, but there will be no fix since there's no problem.

On the other hand, any MSD80-equipped car before 03/08 that has been updated after 03/08 can have "v29.2", i.e. laggy software, which refers to v30.x as well. If the update took place not so long ago, you may have v31.x which is much better but not a complete cure. This will be available from January 09.

And before you ask the next obvious question: no, there is no way to tell via a menu or display, you have to go to your dealer and ask.

[midlife]

Originally Posted by meyergru

That is a very tough question to answer. Judging from how you ask, obviously you have not read the thread. So, from your point of view and according to BMW, the short answer is: none are! At least that is not really depending on build date.

v29.2 has been introduced in 03/08. All (well, most) cars build after that date have MSD81 hardware. BMW says that those cars never had any problem that had to be fixed, so they have v29.2, technically, but for a different hardware, so they should not have lag. Some people think otherwise, despite BMW's claim, but there will be no fix since there's no problem.

On the other hand, any MSD80-equipped car before 03/08 that has been updated after 03/08 can have "v29.2", i.e. laggy software, which refers to v30.x as well. If the update took place not so long ago, you may have v31.x which is much better but not a complete cure. This will be available from January 09.

And before you ask the next obvious question: no, there is no way to tell via a menu or display, you have to go to your dealer and ask.

i have v80 ecu but was updated with the 29.2
needless to say i have a lot of (the worst affected) lag problem.

who knows what this jan bmw update will do for lag - who knows?
but if i have the option now to try 31.x should i do it now since you imply it is better than 29.2?

then i can try the newer jan update if others like that fix?

thanks

[meyergru]

Originally Posted by midlife

who knows what this jan bmw update will do for lag - who knows?
but if i have the option now to try 31.x should i do it now since you imply it is better than 29.2?

then i can try the newer jan update if others like that fix?

Since BMW has actually called the January update a downgrade to "Autobild" and my workshop foreman told me something to the same extent, I strongly believe that old behaviour will be completely restored. If it was different, there would be no need for BMW to make people "understand that the can be more noise" if this update is applied to a pre-09/07 car.

As I have told several times here, I know for sure that v31.1.1 is much better than v30.0.2, since I had both versions on my car (which is a build 09/07 and had v27.x originally). However, it is not the full monty. I expect that in the January update/downgrade.

[BzzzBom]

Do you think Jan 09 build date cars will have the same performance as cars receiving the Jan 09 downgrade?

[meyergru]

Originally Posted by BzzzBom

Do you think Jan 09 build date cars will have the same performance as cars receiving the Jan 09 downgrade?

No, I don't, see my comments at the end of this posting. But that is up to anyone themselves.

To further clarify the situation, I have made a flow-chart, which should be included into the FAQ:

[Tobias1980]

Originally Posted by meyergru

No, I don't, see my comments at the end of this posting. But that is up to anyone themselves.

To further clarify the situation, I have made a flow-chart, which should be included into the FAQ:

As always; great info from you!

[BMWagain]

Originally Posted by meyergru

No, I don't, see my comments at the end of this posting. But that is up to anyone themselves.

To further clarify the situation, I have made a flow-chart, which should be included into the FAQ:

Excellent work Maestro!

[Tschuss]

Originally Posted by meyergru

No, I don't, see my comments at the end of this posting. But that is up to anyone themselves.

To further clarify the situation, I have made a flow-chart, which should be included into the FAQ:

Ausgezeichnet!

[BMWagain]

I have 2009 335iA with 31.1 or 31.2. Manufactured at 30September 2009.
It´s so long ago i tested the 2007 335iA I cannot remember how it performed. Just it was one hell of a car. I think my car is one hell of a car too but it´s nagging me just to think there is a suspicion something is not right with the bottom response.

I am promised to get the Jan 32.* update. I don´t know if I should take it or leave it. Maybe if I go ahead with it and the car doesn´t respond good to it it will f*ck up my day. BMW says cars from 08 March is allright. I can´t take their word for it.

[meyergru]

Originally Posted by BMWagain

I have 2009 335iA with 31.1 or 31.2. Manufactured at 30 august 08. It´s so long ago i tested the 2007 335iA I cannot remember how it performed. Just it was one hell of a car. I think my car is one hell of a car too but it´s nagging me just to think there is a suspicion something is not right with the bottom response.

I am promised to get the Jan 32.* update. I don´t know if I should take it or leave it. Maybe if I go ahead with it and the car doesn´t respond good to it it will f*ck up my day. BMW says cars from 08 March is allright. I can´t take their word for it.

I'd say you cannot be sure if you try only the new version on your MSD81 car. If behaviour does not change, then it might well be that BMW is right in saying that it is fine now, already. But maybe, it was not O.K. before, but nevertheless they changed nothing.

If the behaviour did change, that would in fact prove a lie (namely the "cars from 03/08 are not affected"), despite that you'd probably be glad about it.

The better approach would be to take a pre-v29.2 (or updated after January 2009) MSD80 car for a comparison to your MSD81 car. Only this way you can really tell. If I were an MSD81 owner, I'd surely take that road, given what I've read on this forum.