INFINITI Q45 ignition issue where metal key spins but does not start engine despite new key fob battery on INFINITI Q45

Some INFINITI Q45 owners report experiencing ignition issues where the metal key spins but does not start the engine, even after replacing the key fob battery. These problems may stem from the need to replace the antenna ring or the key system itself. Additionally, some owners find that issues with the battery, alternator, starter, or other components can contribute to the ignition failure. In some cases, timing chain noise has been reported, which could lead to serious engine damage and affect the car's ability to start. Furthermore, interference with Intelligent Key signals may prevent the engine from starting, often resulting in error messages such as "I-Key System Error" or "No I-Key Detected." It is recommended that owners have their vehicles checked by a qualified mechanic or dealership to accurately diagnose and resolve these ignition issues.