INFINITI M56 intermittent alternator charging issue with replaced battery and alternator on INFINITI M56

Some INFINITI M56 owners report experiencing intermittent alternator charging issues even after replacing both the battery and alternator. These problems can be linked to the vehicle's "smart" alternator system, which may lead to battery depletion during frequent short trips. Additionally, some owners find that switching the alternator to "internal regulation" is a simple fix to ensure a consistent output of 14 volts. Symptoms of a failing alternator, such as the battery light illuminating and the car entering "limp" mode, are also reported, which can affect performance and safety. Even after a replacement, owners may struggle with charging issues, highlighting the need for thorough troubleshooting. Regular maintenance, including tightening loose connections and checking the charging system circuit for unwanted resistance, is essential to prevent future problems. Furthermore, common issues like a dead battery or faulty alternator can exacerbate charging difficulties, particularly after extended periods of inactivity.