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NarekN54 NarekN54 is offline
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Exclamation DME Failure, will JB4/MHD effect it? - 09-13-2016, 12:37 PM

I was driving the other day and my SES light started flashing at me. I pulled out my connect kit app and looked up the codes.

29D0 Misfirings, cylinder 4
29D1 Misfirings, cylinder 5
29D2 Misfirings, cylinder 6
30BB DME digital motor electronics, internal failure

My local mechanic shop told me that one of my transistors are fried.

I work at a BMW dealer and I got quoted a decent price to change the DME. I asked one of the service advisors if I'll need to take out my JB4 and he said no, I should be fine.

Will my MHD backend flash cause problems? Will I need to re-flash back to stock? or it won't interfere with the DME replacement ?


I'd appreciate any advice.

Thanks in advance
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 09-13-2016, 12:48 PM

Just fix the transistor. Cheaper and easier than buying a new DME. If you do replace the DME then I'd remove the JB4 to make it easier for them to program it and you'll have to reflash MHD when done.


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Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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NarekN54 NarekN54 is offline
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Default 09-13-2016, 12:53 PM

Quote:
Originally Posted by Terry @ BMS
Just fix the transistor. Cheaper and easier than buying a new DME. If you do replace the DME then I'd remove the JB4 to make it easier for them to program it and you'll have to reflash MHD when done.
My local shop said he found a computer programmer that will be able to fix the transistor for about $600 but I have no idea who this computer programmer is.
Do you know someone that will be able to repair it and is reputable or has done it before?

My dealership quoted me $1500 with part, labor, programming, and tax included.
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 09-13-2016, 01:47 PM

Search MSD80 DME failure and you'll find a link with directions. Should cost $60 or so.


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 09-13-2016, 02:08 PM

600$ for transistor?

what a rip


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NarekN54 NarekN54 is offline
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Default 09-13-2016, 04:51 PM

Quote:
Originally Posted by Terry @ BMS
Search MSD80 DME failure and you'll find a link with directions. Should cost $60 or so.
I searched my VIN up on RealOEM and it's showing MSD81, I have no option for MSD80, does this mean my car is MSD81 or did the 81 just replace the 80?
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unrealii unrealii is offline
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Default 09-13-2016, 05:49 PM

Likely the latter. I have seen some 2008's with MSD80. Later years have MSD81


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unrealii unrealii is offline
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Default 09-13-2016, 05:49 PM

http://www.e90post.com/forums/showthread.php?t=734162


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08 335Ci 08 335Ci is offline
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Default 09-13-2016, 06:29 PM

Before you go any further, make sure your DME isn't overheating due to a bad E-box cooling fan.

Believe me when I say an overheating DME can give you nightmares and cost thousands of $$$ because an $80 fan failed.


No matter how fast I go there's always someone slower in front of me.

You can lead a horse to water but you can't make him Jet Ski.

'10 E92 335 M Sport, JB-4 G5 ISO, 3" CPE Charge pipe, WMI w/dual CM 5 nozzles, 3.5 Tmap, ARM Relocated Inlets (don't do it), VSRF Outlet, BEF, Front Strut Brace, SS brake lines, Drilled and Slotted Rotors, Anti-lag, OCC. Escort Max 360

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rathana_v rathana_v is offline
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Default 09-13-2016, 09:00 PM

Replace the transistors first...got mine fixed for 65 bucks at a local tv repair shop Last month..dme failed on me while doing a 3rd gear pull with mhd/jb4 stacked...shop put new chips on and all is well...i bought chips from digi key for like 2 bucks a piece...07 model here
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MHD MHD is offline
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Default 09-14-2016, 01:10 PM

if you flash i8a0s, you have msd80. ije0s, msd81.
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E90Convert E90Convert is offline
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Default 09-14-2016, 01:37 PM

Intermittent shorting on gen 1 (revision 1-10) injectors cause the resistor to fault. You can replace the transistor cheaply and easily, but must upgrade he injectors to gen 2 in order to fully get rid of the problem permanently.

http://www.n54tech.com/forums/showthread.php?t=36682

Here is my thread solving it on 2 separate occasions


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NarekN54 NarekN54 is offline
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Default 10-06-2016, 07:12 PM

So I replaced all of my transistors, and now I plugged it in and the car cranks but won't start up... any feedback?
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enrita enrita is offline
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Default 10-09-2016, 05:57 PM

Check all dme connections wirewise


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