Lexus RX350 engine won't start, only a small click sound when turning the key on Lexus RX350

Some Lexus RX350 owners report experiencing starting issues characterized by a clicking sound when turning the key, often attributed to a dead or weak 12v battery. This is frequently the most common cause, especially if the engine fails to crank or does so very slowly. Additionally, owners may find that leaving lights on or using electronics while the vehicle is off can lead to battery depletion. Some owners also report problems related to the alternator, which, if not charging the battery properly, can prevent the engine from starting. Furthermore, a failed starter can result in similar symptoms, with the engine producing only a click sound. It is advisable for owners to check the battery first, as it is typically the primary issue, before investigating the alternator and starter for further diagnosis and resolution.