Problems with the 12 V battery on MG: affected models and engines
In 2 models from MG there are 3 documented faults with the 12 V battery. The most important: abnormal 12 V battery drain, AC charging faults and 12 V battery faults on the ZS EV and multimedia system stays on with the car off and drains the 12 V battery on the MG ZS.
Documented faults, from most to least important
Severity × frequency. Below each one, the MG models it appears in.
By MG model
Open yours to see only the faults that affect it, by engine and by year.
Frequently asked questions
What faults with the 12 V battery do MG cars have?
In 2 models from MG there are 3 documented faults with the 12 V battery. The most important: abnormal 12 V battery drain, AC charging faults and 12 V battery faults on the ZS EV and multimedia system stays on with the car off and drains the 12 V battery on the MG ZS. Each fault has its own page with the affected years and versions, the symptoms and the repair cost.
Which MG models have the most problems with the 12 V battery?
MG ZS I (2 faults) and MG MG4 (1 fault).