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Check Battery Voltage

Model: BMW Serie 5 E39 - Years 1995-2003
Part: Onboard computer

Through the onboard computer menu, you can perform diagnostic checks by querying some error codes and evaluating certain operating parameters, such as the battery charge status. By holding down the trip reset button for a few seconds, you can enter the menu and then scroll through it by pressing the trip reset button again: in this case, it may be helpful to have a service or owner's manual to verify the correspondence between the number displayed on the screen and the corresponding menu item.
Once you select the item corresponding to the battery voltage, the battery voltage will be displayed: a reliable parameter will be between 13.5 and 14.2 Volts.

Updated on 10 February 2026 by ScegliAuto

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