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March 1, 2021 Service bulletin

Programing the dual storage system and replace it if necessary

BMW technical service bulletin B610321 for 2019-2021 BMW X5, 2019-2021 BMW Z4 and 2019-2021 BMW 330I and others.

Bulletin number
B610321
Component
Equipment
Summary
PROGRAMING THE DUAL STORAGE SYSTEM AND REPLACE IT IF NECESSARY: The 12 V battery's dual storage system (DSS) may contain a software error which intermittently causes a continuous resetting of the microcontroller and communication failure.

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