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July 1, 2018 Service bulletin

Buzzing noise from valvetronic motor before or after engine operation

BMW technical service bulletin B120418 for 2012-2016 BMW 328I, 2017-2018 BMW 330I and 2012-2016 BMW 335I and others.

Bulletin number
B120418
Component
Engine and engine cooling
Summary
BUZZING NOISE FROM VALVETRONIC MOTOR BEFORE OR AFTER ENGINE OPERATION: Buzzing noise may be heard from the Valvetronic motor when the vehicle is unlocked, before the engine is started, or after the engine is turned off.

Owners of these vehicles have filed 762 complaints in the engine category.

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