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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning How long does it take to flash BM3 back to stock?

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      01-28-2019, 04:48 PM   #1
BentZero
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How long does it take to flash BM3 back to stock?

I'm taking my car to the dealer tomorrow for scheduled maintenance. Wondering how long it takes to flash back to stock. Is it like the initial unlock and takes a few minutes or is it like subsequent flashes that take less than a minute?

Also, is it even worth going back to stock? Thanks in advance.
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      01-28-2019, 04:59 PM   #2
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not sure on the time it takes. i would definitely flash back to stock as your going to a dealership and dealerships are known for some caring about mods and voiding warranty and others may not care at all.
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      01-29-2019, 09:17 AM   #3
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I contacted BM3 (proTuningFreaks) technical support. Flashing to and from stock takes a little less time than the initial unlock took. I don't trust my battery since I've had battery warnings lately. Supposedly due to the cold. I close on my house in a month, so I'll just wait until then when I can hook the car up to the battery charger while I lock the DME.
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      01-29-2019, 02:08 PM   #4
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No experience with BM3.... My Active Autowerke tune takes about 2-3 minutes to flash. I hooked up to a battery the first time I did it, but have returned to stock and to Stage 1 probably 3-4 times without it since. Not sure if the time would vary much from tuner to tuner.
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      01-29-2019, 05:39 PM   #5
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