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      11-02-2009, 06:44 PM   #1
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Common Problem On The ///M?

so my close buddy has a 08 E93 M3 6MT

so i called him up tonight and he told me he blew his rear differential!!

*Story* he was driving around and decided to do a 1st gear lanuch and he said right before he hit 2nd it blew!!!!

he has came from

E60 M5
E46 CSL M3
CLK 550

and he knows how to drive the only mod he has is a AA Tune...


my question is will the dealer cover this?!?!?!
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      11-02-2009, 06:50 PM   #2
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Dealer should cover it, drivetrain loss

I would flash it to stock just to be safe, but this car isn't meant to be launched from a dig, did he do it multiple times or something??

This is very strange, probably just a one case scenario, haven't heard of this happening in E9x's yet but was known in the E46 and E36
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      11-02-2009, 06:52 PM   #3
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Quote:
Originally Posted by Panda///Monic View Post
Dealer should cover it, drivetrain loss

I would flash it to stock just to be safe, but this car isn't meant to be launched from a dig, did he do it multiple times or something??

This is very strange, probably just a one case scenario, haven't heard of this happening in E9x's yet but was known in the E46 and E36
thats what i said thanks for ur input...


so are u 100% sure they will replace it Under Warrenty?
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      11-02-2009, 06:52 PM   #4
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Quote:
Originally Posted by Panda///Monic View Post
Dealer should cover it, drivetrain loss

I would flash it to stock just to be safe, but this car isn't meant to be launched from a dig, did he do it multiple times or something??

This is very strange, probably just a one case scenario, haven't heard of this happening in E9x's yet but was known in the E46 and E36
Good luck with that. There is no such thing as flashing it back to stock with no fingerprints.
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      11-02-2009, 06:54 PM   #5
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Quote:
Originally Posted by Panda///Monic View Post
Dealer should cover it, drivetrain loss

I would flash it to stock just to be safe, but this car isn't meant to be launched from a dig, did he do it multiple times or something??

This is very strange, probably just a one case scenario, haven't heard of this happening in E9x's yet but was known in the E46 and E36
The dealer can't "see" his aftermarket ECU tune...
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      11-02-2009, 06:55 PM   #6
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Sorry to hear about this. I would definitely flash it back to stock. Launches from the dig are bad news.

Please keep us updated on this.
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      11-02-2009, 06:55 PM   #7
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Quote:
Originally Posted by Donald-335i View Post
thats what i said thanks for ur input...


so are u 100% sure they will replace it Under Warrenty?
That depends...
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      11-02-2009, 06:56 PM   #8
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Quote:
Originally Posted by foosh View Post
Good luck with that. There is no such thing as flashing it back to stock with no fingerprints.
I've heard this is true especially when claiming "major warranty issues".
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      11-02-2009, 06:56 PM   #9
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1st gear launches are that bad for the car?
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      11-02-2009, 06:57 PM   #10
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I'm not 100% sure, but they car read if the car was redlined above the stock limits and if they went crazy I'm sure they could see your air and fuel mixture.

They can't tell you had a tune, but they can sort of get a good idea.
But the software isn't the point here, sounds like you've just had a failed diff or maybe they put the wrong fluid in there (DCT manual??) Could be a number of things. Depending on what they find, they should cover it. Would be pretty farfetched to blame the diff problem on the software instead of just covering the work
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      11-02-2009, 06:58 PM   #11
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Quote:
Originally Posted by jimmyeatsworld View Post
Sorry to hear about this. I would definitely flash it back to stock. Launches from the dig are bad news.

Please keep us updated on this.
That's really not necessary...
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      11-02-2009, 06:58 PM   #12
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Quote:
Originally Posted by Lemans_Blue_M View Post
The dealer can't "see" his aftermarket ECU tune...

When the dealer calls BMW NA, they might.
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      11-02-2009, 06:59 PM   #13
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Quote:
Originally Posted by Lemans_Blue_M View Post
That depends...
While the dealer may not be able to "see" the tune, it is BMW that must approve the warranty work in order for the dealer to get paid. If BMW decides to ask for the complete file, they will be able to see that the car was tuned, whether it's flashed back to stock or not.

That's why, "it depends." It depends upon whether BMW decides to investigate whether the engine has been modified. If they do, they can deny it on the basis of an "altered drivetrain."

Obviously, LMB knows this. I just quoted him to illustrate what "depends" means.
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      11-02-2009, 07:00 PM   #14
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Quote:
Originally Posted by foosh View Post
While the dealer may not be able to "see" the tune, it is BMW that must approve the warranty work in order for the dealer to get paid. If BMW decides to ask for the complete file, they will be able to see that the car was tuned, whether it's flashed back to stock or not.

That's why, "it depends." It depends upon whether BMW decides to investigate whether the engine has been modified. If they do, they can deny it on the basis of an "altered drivetrain."

Obviously, LMB knows this. I just quoted him to illustrate what "depends" means.
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      11-02-2009, 07:02 PM   #15
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Quote:
Originally Posted by Panda///Monic View Post
I'm not 100% sure, but they car read if the car was redlined above the stock limits and if they went crazy I'm sure they could see your air and fuel mixture.

They can't tell you had a tune, but they can sort of get a good idea.
But the software isn't the point here, sounds like you've just had a failed diff or maybe they put the wrong fluid in there (DCT manual??) Could be a number of things. Depending on what they find, they should cover it. Would be pretty farfetched to blame the diff problem on the software instead of just covering the work
This is the most likely reason.

There were quite a few E46 M3 diff that bit the dust, because the OE diff fluid didn't protect the internal gears and clutches.
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      11-03-2009, 01:13 AM   #16
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very likely that the dealer can tell if the car has been launched violently..gl to your friend man
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      11-03-2009, 07:55 AM   #17
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don didnt you ever watch that vid ...you shouldnt track m3's lol i think he already took it to the dealer don he blew his rear end about 1 month ago.
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      11-03-2009, 09:33 AM   #18
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how can they expect you not to launch a high-performance car, isn't that the point of having a launch control system?
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      11-03-2009, 09:37 AM   #19
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Quote:
Originally Posted by mrkbbd View Post
how can they expect you not to launch a high-performance car, isn't that the point of having a launch control system?
The car in question is a 6MT (e.g. no launch control).
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      11-03-2009, 09:39 AM   #20
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Quote:
Originally Posted by foosh View Post
While the dealer may not be able to "see" the tune, it is BMW that must approve the warranty work in order for the dealer to get paid. If BMW decides to ask for the complete file, they will be able to see that the car was tuned, whether it's flashed back to stock or not.

That's why, "it depends." It depends upon whether BMW decides to investigate whether the engine has been modified. If they do, they can deny it on the basis of an "altered drivetrain."

Obviously, LMB knows this. I just quoted him to illustrate what "depends" means.
Since the OP said the car is stock other than the ECU. I doubt BMW would even think it is modified. So chances are they would just fix it.
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      11-03-2009, 10:04 AM   #21
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Right, we said, "it depends." Chances are they will, but there's a chance they won't, if they decide to dig.
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      11-03-2009, 10:44 AM   #22
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Heard about this happening at a strip in NJ this weekend. If your friend is that guy, I heard he launched at like 6k rpms.
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