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I know I have got a drivetrain malfunction error when first starting the car up after installing JB4. You need to see what is causing the issue.
Might be worth it to completely remove JB4 and drive and see if it persists. If not re-install and see if it comes back. In future I would remove JB4 before any dealer visit. Just in case they update software, etc.
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2021 G01 X3 M40i Carbon Black Cognac Vernasca
Retired: 2013 F30 335i Glacier Silver Metallic Coral Red Dakota
Retired: 2011 E90 328i Space Gray Black Dakota
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