When diagnosing why the key won't turn in a 2012 INFINITI FX35, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex issues. Start by examining the key itself; a damaged or worn key can easily prevent ignition. If you have a spare key, try using it to determine if the problem lies with the original key. Next, check the steering wheel, as the steering lock can sometimes engage, making it difficult to turn the key. Gently wiggle the steering wheel while attempting to turn the key to see if this resolves the issue. Additionally, inspect the vehicle's battery and the key fob battery, as a weak battery can hinder the ignition process. If these initial checks do not yield results, consider the ignition cylinder, which may be worn or damaged and could require inspection or replacement. Ensure that the shift lever is in the correct position, as being in the wrong gear can also prevent the key from turning. Lastly, if the lock cylinder is jammed, applying a lubricant may help free it. By following this diagnostic approach, you can effectively identify and address the issue preventing your key from turning.

When facing the frustrating situation of a key that won't turn in the ignition of a 2012 INFINITI FX35, it's essential to consider several common problems that could be at play. One of the first things to check is whether the steering wheel is locked, as this can prevent the key from turning. Gently moving the steering wheel left and right while attempting to turn the key may help unlock it. Additionally, inspect the key itself for any signs of wear or damage; a worn key can hinder ignition engagement, so trying a spare key can be a quick diagnostic step. If the key appears fine, the ignition cylinder might be the culprit, as it can wear out over time and may require professional attention if faulty. Another critical factor to consider is the vehicle's battery; a dead or weak battery can lead to ignition issues, so ensure it is charged and functioning properly. Furthermore, check the ignition switch for faults, as a malfunctioning switch can also prevent the key from turning. Lastly, ensure that the gear shift is fully in park or neutral, as being in the wrong position can block the ignition from engaging. By systematically addressing these potential issues, you can effectively troubleshoot and resolve the problem of a key that won't turn in your INFINITI FX35.