The contact owned a 2019 Audi E-Tron. The contact had pulled into a charging station and had plugged the vehicle in to charge the battery. The contact stated she heard a loud boom 20 minutes after having plugged the vehicle into the charging station. The contact saw white smoke issuing from the rear of the vehicle and then she saw flames issuing from the rear driver-side wheel. The contact stated that prior to the fire department's arrival a passerby and a store employee, from a store that she was parked in front of, extinguished the flames with chemical hand-held fire extinguishers. The contact stated the vehicle was towed to her insurance provider's impound lot for investigation. The manufacturer had not been informed of the failure. The failure mileage was approximately 111,000.