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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 > Upgrading from BMS stage 1 to stage 2



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      10-07-2013, 06:03 PM   #1
blk335xi
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Upgrading from BMS stage 1 to stage 2

is it possible for N55?

I've searched and can't find an answer. Thanks.
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      10-07-2013, 07:38 PM   #2
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If you are referring to the tune, then yes you can. You but and install the CAN wires.
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      10-07-2013, 08:07 PM   #3
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as well as other plugs that wasn't installed when using stage 1
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      10-07-2013, 09:23 PM   #4
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But I need to purchase something additional to the Stage 1 tune, correct?

To Clarify, My stage 1 tune has CAN wires bundled up that went unused. Do I need to just buy the new 'end unit' that sits in the ECU box? Anybody know how much that costs?

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      10-07-2013, 10:53 PM   #5
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You can buy a whole separate unit.
I am sure you can add the hardware and software for just the upgrade too.
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