BMW X5 key fob malfunction preventing door access on BMW X5

Some BMW X5 owners report experiencing issues with their key fob that prevent access to the doors, often due to a dead coin battery, which is the most common cause. Others have noted that worn buttons on the key fob can lead to malfunction, while problems with poor battery contact may also contribute to the issue. Water damage has been reported as a cause of key fob malfunctions, alongside potential problems with the receiver module affecting functionality. Additionally, some owners experience signal interference that disrupts proper operation, or face issues related to a dead 12-volt battery. In cases where the key fob becomes unpaired, reprogramming may be necessary for it to function correctly. Lastly, a defective key fob itself can be the root cause of the problem. To resolve these issues, owners are advised to check and replace the battery, inspect the buttons for wear, dry the fob if it gets wet, avoid signal interference, and reprogram the key if needed.