Alternator/generator/regulator problems of the 2016 Subaru Crosstrek

The contact owns a 2016 Subaru Crosstrek. The contact stated that while coming to a stop at a traffic signal, the vehicle was idling roughly. The contact stated no warning light was illuminated. The contact stated that the failure was intermittent but had become a recurring failure. The contact stated that the failure occurred frequently whenever the a/c was running. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the throttle body needed to be cleaned. The vehicle was repaired. The contact stated that the failure returned, and the vehicle was taken back to the same dealer who diagnosed the vehicle and determined that the alternator and belt tensioner needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 32,000.