Audi A8 D3 Battery System Failure

The battery has been great for 11 years, it doesn’t seem to hold charge any more. I had an incident of battery failure yesterday after parking the car for about 20 minutes, the car wouldn’t crank and all indicators on the dash was flashing while I tried to start the car. The battery definitely had no juice to crank the starter. After the car get a jump from a Honda Accord battery, it started right up, drove home and the battery measured 12.3V and the charging system was 14.1V as the car is running.

Although the batter measured at 12.3V, the MMI battery indicator still registered 0% which cause the concern that the battery system is not working properly. I’ll investigate and report back.

MMI Battery Indicator % Low     Indicator after the batter was jumped

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