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April 1, 2020 Service bulletin

Service action - checking the dual storage system and replace if necessary

BMW technical service bulletin B611320 for 2019-2020 BMW X5, 2019-2020 BMW Z4 and 2019-2020 BMW 330I and others.

Bulletin number
B611320
Component
Electrical system
Summary
SERVICE ACTION - CHECKING THE DUAL STORAGE SYSTEM AND REPLACE IF NECESSARY: In the event of an accident the two-battery Dual Storage System (DSS) is disconnected from the electrical system via an internal relay. In some cases the relay is stuck closed and a fault is set. In these circumstances: A crash shutdown of the DSS does not occur The power distribution box is supplied with power until the DSS is fully discharged

Owners of these vehicles have filed 195 complaints in the electrical category.

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