Lexus IS350 alternator failure causing power loss and engine shutdown on Lexus IS350

Some Lexus IS350 owners report experiencing issues related to alternator failure, including power loss and engine shutdown. Common symptoms of a failing alternator include the activation of the red battery warning light, electrical issues, dimming lights, slow cranking, dead batteries, and stalling engines. Additionally, some owners notice dimming or flickering headlights, which may indicate insufficient power generation by the alternator. In severe cases, complete power loss while driving can occur, posing significant safety risks, particularly on highways. To mitigate these risks, it is crucial for owners to monitor for signs of alternator failure, such as unusual noises, burning smells, and flickering lights under electrical load. Testing the alternator's status can be performed either while installed in the vehicle or through bench testing at auto stores.