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November 1, 2021 Service bulletin

???Due to an unfavorable operating point primarily in the low-end torque range, the fuel vapor scavenging...

BMW technical service bulletin B121221 for 2018-2021 BMW X3, 2019-2021 BMW 330I and 2017-2021 BMW 530I and others.

Bulletin number
B121221
Component
Back over prevention
Summary
???Due to an unfavorable operating point primarily in the low-end torque range, the fuel vapor scavenging that takes place in that range may result in incorrect detection of a mixture that is too rich. As a result, an incorrect mixture adaptation value is stored.

Owners of these vehicles have filed 62 complaints in the driver assistance category.

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