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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Mhd and dealer visit



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      10-01-2018, 05:04 AM   #1
Herakles
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Mhd and dealer visit

Hello all
I have appointment at dealer today for a recall work (blower motor wiring that can cause fire)

I just remembered I have my mhd s1 active- when they plug in the key fob can they see anhyrjjng that might cause issue with completing recall work?

Should I set it back to stock ? It's out of warranty so the warranty is not the concern -
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      10-01-2018, 07:53 AM   #2
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i would just call them and tell them not to do any software updates, besides that you're probably fine
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      10-01-2018, 08:09 AM   #3
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Quote:
Originally Posted by Herakles View Post
Hello all
I have appointment at dealer today for a recall work (blower motor wiring that can cause fire)

I just remembered I have my mhd s1 active- when they plug in the key fob can they see anhyrjjng that might cause issue with completing recall work?

Should I set it back to stock ? It's out of warranty so the warranty is not the concern -
Dealer employee here.

They will not be able to see any software from the key read data. The only way they can over write MHD would be if they did a software update, which I highly doubt they would do out of random for a recall job unless specifically asked for. You are totally fine to leave MHD on there.
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      10-01-2018, 08:28 AM   #4
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The dealer updated my car when the FRM3 was replaced under extended warranty, I still had MHD 2+ installed. The airbag and blower motor were also done while there. They didn't say anything to me, and I just needed to reflash MHD. Maybe I just have a cool dealer though.
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      10-01-2018, 07:20 PM   #5
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I left mine in. They didn't care. Mine did get overwritten due to an issue that they caused to my JBE during the recall that required a full reflash of all modules in the car, but that was a very rare case.
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      10-02-2018, 09:30 AM   #6
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I was brought mine in 2 weeks ago with stage2+ to get the frm replaced under warranty and I also had to reflash mhd after, it was the long flash. I don't think they cared i had mhd, no one mentioned it
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      10-02-2018, 09:59 AM   #7
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Had the blower motor wiring recall done and they did not touch anything else. Had MHD as well. I think on these recalls they only do the minimum they need to.
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      10-06-2018, 05:39 AM   #8
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You're fine, Blow motor and airbag recalls are too common for us. As they mentioned tell them you don't need a software update and your good
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      10-08-2018, 10:32 AM   #9
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As long as your DME had the latest update when you installed MHD, then you're good. MHD does nothing with the software number, which is what the dealer's system looks at.
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      10-15-2018, 05:55 PM   #10
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Just did the same recall at bmw victoria and I'm running mhd beta maps, no problems
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