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May 17, 2021 Service bulletin

This bulletin contains instructions for when the MMI shows the message "Read error occurred when accessing...

Audi technical service bulletin A9121022057052_4 for 2017-2019 Audi A4, 2016-2020 Audi A6 and 2018-2020 Audi Q5 and others.

Bulletin number
A9121022057052_4
Component
Equipment: electrical: navigational system(global positioning system)
Summary
This bulletin contains instructions for when the MMI shows the message "Read error occurred when accessing the navigation data" after initialization and reboots constantly with DTC B126CF0 and/or B126CF1.

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