[f82george]

Originally Posted by tmo335tt

Or you can open up the dme and find the bad MOSFET and replace it for .25c, i've been in your boat.

where can i get the parts , online, or local stores

[GTstunna612]

Originally Posted by GUCCI_GEVO

i got the car CPO with 50k on it at 55k they changed both my turbos for the waste gate rattle at 66k the transmission went out and was replaced under cpo and now the dme went out at 67k

my car isnt cpo but I do have an extended warranty through a third party and bmw has hpfp 10/120K and wastegate rattle 8/82K....wow thats a lot of serious issues your having. If its CPO I would def let them takecare of you u at least have CPO

[GTstunna612]

just keep on bugging them

[f82george]

Originally Posted by GTstunna612

my car isnt cpo but I do have an extended warranty through a third party and bmw has hpfp 10/120K and wastegate rattle 8/82K....wow thats a lot of serious issues your having. If its CPO I would def let them takecare of you u at least have CPO

the car has went threw 6 hpfp's before i got it

[Leroi]

What's you build date?

SIB 12 18 07
Engine Electrical Systems October 2007
Technical Service

SUBJECT
N54: Running Issues with Various Faults in DME


MODEL
E90, E92, E93 with N54 from 6/10/07 to 8/18/07

E60, E61 with N54 from 6/10/07 to 8/18/07


SITUATION
Vehicle runs poorly, misfires, and may not start. One of the following fault codes, or the combination of the codes, is stored in the DME: 30BA , 30BB or 2ACC. Subsequent fault codes like 29CC, 29CD, 29CE, 29CF or 2ACB may be stored in the DME as well. Service Engine Soon Light may be illuminated.

CAUSE
Defective diode in DME.

CORRECTION
On a customer complaint basis and only if the vehicle is in the effected production range, replace the DME and reprogram/recode the complete vehicle.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.

Please refer to the latest KSD for all applicable labor operations and allowances. If the appropriate labor operation is not contained in KSD, then a work time labor operation should be used.

Defect Code
12 71 00 15 00

[f82george]

Originally Posted by Leroi

What's you build date?

its 7/07 build date

[Beemw335]

I have an 07 and every time I see a thread about dme failure I get scared.
I really hope you get this sorted out.
You are under cpo so I cant see them denying you warranty, just hope for the best man.

[tmo335tt]

Originally Posted by GUCCI_GEVO

where can i get the parts , online, or local stores

digikey.com

This is a common problem with the MSD80's and tell everyone at BMW to get fucked...I know another member on here that got screwed $3500 for a new dme and injectors that the dealer told him that he had to buy to fix it. Could have been fixed to less than a $1...I used parts from his bad dme to fix mine. BMW will never replace a simple part like a MOSFET and will never actually open your DME so don't be afraid to dig in. I just did this on another 335 that I have now as well.

[GTstunna612]

Originally Posted by tmo335tt

digikey.com

This is a common problem with the MSD80's and tell everyone at BMW to get fucked...I know another member on here that got screwed $3500 for a new dme and injectors that the dealer told him that he had to buy to fix it. Could have been fixed to less than a $1...I used parts from his bad dme to fix mine. BMW will never replace a simple part like a MOSFET and will never actually open your DME so don't be afraid to dig in. I just did this on another 335 that I have now as well.

So it is fixable? What are some symptoms?

[tmo335tt]

Originally Posted by GTstunna612

So it is fixable? What are some symptoms?

The OP posted the same symptoms that me and everyone else has experienced. You most likely will not be driving the car anywhere unless you only lost one MOSFET..I blew two and had to tow the car home, it would barely run at all.

[f82george]

Originally Posted by R 4 5 T 4 M 4 N

07 DMEs can have faulty Diodes in the injector MOSFETS (they short).

will these diodes work ? IRF644SPBF

[tmo335tt]

Originally Posted by GUCCI_GEVO

will these diodes work ? IRF644SPBF

Order these:

FDB14N30TM

http://www.digikey.com/product-detai...MCT-ND/1566830

If you are scared to solder it yourself then take to tv repair shop and they will probably do it for no more than $20

[Bimmer305]

My advice is, do not fix it yourself. Today you may fix one MOSFET, next month you may be on the side of the road again for another one.

Fight for a new DME, you are not stealing anything. It is in your on warranty manual, that the DME is warranted for 80K miles.

Do some research on this forum on how many people had the same problem and got new DME's at no cost.

[GTstunna612]

mine is a 04/07 build and I havent and hope to not experience a DME failure but good to know its covered until 80K and if need be can be a quick fix at home since my dad knows how to solder pc boards.

[GTstunna612]

my DME says SIEMENS/VDO with a BMW logo in a silver/aluminum looking case

[Bimmer305]

Originally Posted by GTstunna612

my DME says SIEMENS/VDO with a BMW logo in a silver/aluminum looking case

MSD80

[GTstunna612]

Originally Posted by Bimmer305

MSD80

Yes that's what it looks like but I will double check after work. What causes or preventions can you take to prevent the DME to blow the MOSFETs? At WOT I don't heard any backfires and the only mods I have are JB4 and DCI. Tranny shifts smooth and I don't beat on the car. Only when need too...

[Bimmer305]

Originally Posted by GTstunna612

Yes that's what it looks like but I will double check after work. What causes or preventions can you take to prevent the DME to blow the MOSFETs? At WOT I don't heard any backfires and the only mods I have are JB4 and DCI. Tranny shifts smooth and I don't beat on the car. Only when need too...

I do not know for sure what the cause is.
But I think it gets damage do to misfire, because that;s how it happened on mine.

I filled up with 60% E85 (by mistake), went WOT which caused a misfire on two cylinders and took out the DMI with it.

[joec500]

I am thinking it might be worth just replacing all 6 mosfets if one dies, or if anyone can actually provide a service to proactively re-solder all 6 ad not have to worry about it

[GTstunna612]

Originally Posted by Bimmer305

I do not know for sure what the cause is.
But I think it gets damage do to misfire, because that;s how it happened on mine.

I filled up with 60% E85 (by mistake), went WOT which caused a misfire on two cylinders and took out the DMI with it.

So to be on the safe side it's always good to scan for codes and replace plugs, coils, injectors when need be

[f82george]

Originally Posted by joec500

I am thinking it might be worth just replacing all 6 mosfets if one dies, or if anyone can actually provide a service to proactively re-solder all 6 ad not have to worry about it

That's what I was planning if the don't replace my dme I'm going to replace all 6 of the MOSFETS

[E30M3Driver]

Glad i got a new MSD81 dme with the BMW performance powerkit.