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How to Replace the TCM Battery in a BMW 3 Series?

Model: BMW Serie 3 F31, F30 - Years: 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Part: Battery

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Video tutorial

When the warning message indicating an emergency call error appears on the dashboard of the BMW 3 Series, it means that the TCM battery, also known as the backup battery, needs to be replaced. This battery is located at the top of the car, under the upholstery covering the roof.

To remove it, you need to loosen the screws securing the courtesy light assembly so that the upholstered part of the roof can be moved, providing access to the TCM battery. Replace it with a new replacement part, and reinstall all previously removed components.


Updated on 26 May 2026 by ScegliAuto


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How to reset the tyre pressure warning light on the Kia Niro EV?

To reset the tyre pressure warning light on the Kia Niro EV, inflate the tyres until they reach the correct pressure value. This value is indicated on the sticker attached to the driver's door pillar. Once the tyres are inflated, turn on the instrument cluster to check that the warning light has completely disappeared from the display. If it is still present, you may need to drive for a few miles to ensure it disappears completely from the screen.

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by ScegliAuto

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