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April 1, 2020 Service bulletin

Erroneous electric fan function fault stored in the dme

BMW technical service bulletin B121619 for 2018-2020 BMW X3, 2017-2020 BMW 530I and 2016-2019 BMW 750LI and others.

Bulletin number
B121619
Component
Engine and engine cooling
Summary
ERRONEOUS ELECTRIC FAN FUNCTION FAULT STORED IN THE DME: The following faults may be erroneously stored in the Digital Motor Electronics (DME): Fault code: Control module: Fault code text: 1A2806 DME Electric fan function: limited operation 1A4007 DME Electric fan function: Operating mode implausible And: There is no customer-facing vehicle symptom(s) or related check control message displayed. A software error may cause these faults to be erroneously stored in the Digital Motor Electronics (DME).

Owners of these vehicles have filed 134 complaints in the engine category.

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