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      09-20-2018, 05:51 PM   #1
BAMFM3
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Increase battery discharge = DCT shifter? Or EDC-K

Car sat (not on tender) for about a month in a garage. When I got home I got increased battery discharge warnings and after a few weeks of constantly putting on tender, finally went to dealer. They’re telling me I need to replace the DCT shifter. (Battery is a year old, OEM coded at dealer)

I assumed the EDC module that would be the root cause since it seems way more common here. Never got any warnings/malfunctions for DCT but did get one for EDC (happened first day of increased battery discharge) that went away and never came back. Start button is illuminated when car off as Mike Benvo had pointed out in an old post and I don’t have comfort access. No other lights stay on when car is off and locked.

I saw only one other person here who had this replaced due to battery drain. Anyone else chime in on similar experiences?

Shifter P/N = 61317842102

UPDATE: Dealership is literally bending over backwards to exhaust all options and help me out even though I am not under warranty. Will update once issue is resolved. Very pleased - this is why I drive 2 hours out of my way to this dealer for service and will continue to do so.

UPDATE 2: They replaced shifter and determined it is indeed the EDC module. They are replacing both parts under goodwill for me.

Thanks
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Last edited by BAMFM3; 09-25-2018 at 02:38 PM..
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      09-20-2018, 06:43 PM   #2
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So do they want to replace the illuminated knob or the module underneath? If it's the shifter I have a spare one I can lend you and swap out yourself. If it's the shifter underneath, used ones are pretty cheap since nobody ever replaces them.

Also, how much to replace the EDC module? If it's a lot cheaper maybe replace that first?

Last edited by msan; 09-20-2018 at 10:39 PM..
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      09-20-2018, 07:34 PM   #3
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Quote:
Originally Posted by msan View Post
So do they want to replace the illuminated knob of the module underneath? If it's the shifter I have a spare one I can lend you and swap out yourself. If it's the shifter underneath used one are pretty cheap since nobody ever replaces them.

Also, how much to replace the EDC module? If it's a lot cheaper maybe replace that first?
I think it’s the shifter itself. The part number shows up on ECS and Turner’s site as the shifter with a module attached to it. Both the shifter and the EDC module are about the same new, ~$650.

I appreciate the offer and the response, will see what they say tomorrow. It’s a 2013 with 47k miles, take real good care of the car so hopefully it’s just a freak thing. Fingers crossed!

Pretty curious if anyone else has had to replace because it doesn’t seem like a common failure.
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      09-20-2018, 08:27 PM   #4
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Also make sure they perform the battery cable service billeting to eliminate that as a cause
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      09-24-2018, 02:46 AM   #5
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Easy way to check.. unplug the EDC module and see if the issue continues. If it does, the unplug the shifter and check again.

I've seen this many times w/ EDC, but never with GWS. That doesn't mean it couldn't be it, though.

We have both parts in stock. Good luck with resolution!
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      09-25-2018, 02:36 PM   #6
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Quote:
Originally Posted by BPMSport View Post
Easy way to check.. unplug the EDC module and see if the issue continues. If it does, the unplug the shifter and check again.

I've seen this many times w/ EDC, but never with GWS. That doesn't mean it couldn't be it, though.

We have both parts in stock. Good luck with resolution!
That’s exactly what I was going to do when I got car back...but I just got a call from the dealer. They replaced the shifter and it didn’t fix it. It’s the EDC module.

They’re replacing both parts at no cost to me though. Excellent dealer!
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      09-25-2018, 04:09 PM   #7
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so it's not happening again? I just replaced my battery.
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      09-25-2018, 09:32 PM   #8
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Quote:
Originally Posted by M3 Number 86 View Post
so it's not happening again? I just replaced my battery.
Car is still getting the increased battery discharge even after dealership replaced the DCT shifter. They have concluded that it is in fact the EDC module that is failing and are now replacing that.

My battery is only about 10 months old, so hopefully the EDC failure didn't screw it up.
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      09-26-2018, 02:02 AM   #9
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Quote:
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Quote:
Originally Posted by M3 Number 86 View Post
so it's not happening again? I just replaced my battery.
Car is still getting the increased battery discharge even after dealership replaced the DCT shifter. They have concluded that it is in fact the EDC module that is failing and are now replacing that.

My battery is only about 10 months old, so hopefully the EDC failure didn't screw it up.
Hope you figure it out. Did you replace battery with the same specs?
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      09-26-2018, 04:41 AM   #10
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Quote:
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Hope you figure it out. Did you replace battery with the same specs?
Sure did. OEM battery coded at the dealer. Same dealer the car is at right now actually.

The main thing I am worried about now is the dealer not knowing to code the new EDC module correctly since I have competition package. I’m not sure if that needs to be done or not but I’ve read that is a Yes.
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      09-26-2018, 08:21 AM   #11
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An actual franchise dealer will program it correctly according to the VIN/VO. The software selects the correct coding for the module. For that matter any module with an update available will also be updated at the same time. The dealership's ISTA-P software is just about foolproof.
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      09-26-2018, 08:51 AM   #12
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Quote:
Originally Posted by deansbimmer View Post
An actual franchise dealer will program it correctly according to the VIN/VO. The software selects the correct coding for the module. For that matter any module with an update available will also be updated at the same time. The dealership's ISTA-P software is just about foolproof.
+1 it will code it with comp settings, nothing to fear.
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      09-29-2018, 02:54 PM   #13
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Quote:
Originally Posted by deansbimmer View Post
An actual franchise dealer will program it correctly according to the VIN/VO. The software selects the correct coding for the module. For that matter any module with an update available will also be updated at the same time. The dealership's ISTA-P software is just about foolproof.
Quote:
Originally Posted by BPMSport View Post
+1 it will code it with comp settings, nothing to fear.
Thank you guys for the peace of mind. I got the car back and my time was wiped so I imagine they did whatever they needed to do correctly. Reinstalled the tune and car is running beautifully again!
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