I would take it to the dealer and have them check it if you replaced the battery.
Something is wrong.
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Dave.0 Helix & RMW PoweredLifetime Supporter
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Welcome, thanks for joining Motoring Alliance, the FUN and Friendly MINI Community.
Don't just change the Body Control Unit without more diagnosis. Can the shop you used pull any codes? They need more than just a a basic code reader for BMW/MINI to look deeper in the system.