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Welcome to the forum. Could be a number of things but most like the stuck valve issue that others are having. Your dealers will be able to track it down. Have a safe trip.
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2021 BMW G20 M340i xDrive - Verde Ermes/Black - 03/2024.40
2019 BMW G05 X5 xDrive40i - Phytonic Blue/Cognac - 11/2023.50
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