A software error in the telematics control unit can result in an interruption in communication between the...
BMW technical service bulletin B840420 for 2019-2020 BMW 330I, 2017-2020 BMW 530I and 2017-2020 BMW 540I and others.
- Bulletin number
- B840420
- Component
- Electrical system: software
- Summary
- SERVICE ACTION - PROGRAM TELEMATICS MODULE: A software error in the telematics control unit can result in an interruption in communication between the vehicle and the back end (BMW server). Software error in the Advanced Telematics Module (ATM).
Owners of these vehicles have filed 77 complaints in the electrical category.
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