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February 1, 2021 Service bulletin

Combustion control valve lift at idle

BMW technical service bulletin B121318 for 2012-2016 BMW 328I, 2018-2021 BMW X3 and 2017-2020 BMW 330I and others.

Bulletin number
B121318
Component
Engine and engine cooling
Summary
COMBUSTION CONTROL VALVE LIFT AT IDLE: The vehicle will run rough or hesitate when accelerating from a stationary position.

Owners of these vehicles have filed 916 complaints in the engine category.

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