Fiat 500X keyless entry malfunction and starting issues after battery replacement on Fiat 500X

Some Fiat 500X owners report experiencing keyless entry malfunctions and starting issues following a battery replacement. These problems may arise if the key fob battery contacts are not clean or properly aligned, which can hinder connectivity. Additionally, issues with the battery connection to the key fob's circuit board, such as corrosion or misalignment, account for approximately 20% of key fob malfunctions. Furthermore, numerous NHTSA complaints regarding the electrical system in the 2016 Fiat 500X suggest potential underlying electrical issues affecting the keyless entry system. Owners have also noted that symptoms like dim headlights or weak starting may indicate a faulty alternator, which could compromise battery performance. If these issues persist, it is advisable for owners to seek assistance from a Fiat dealership or qualified mechanic, despite some reported challenges with dealership support, to ensure a thorough diagnosis and resolution.