What is the reason why the Buick Excelle key cannot be turned and the car won't start?

[_travis]

Buick Excelle key cannot be turned and the car won't start because the teeth of the key are excessively worn, preventing the spring leaves from being lifted, which makes it impossible to turn. Below are the detailed explanations: 1. Reason: The teeth on the Buick Excelle key, commonly known as "dog teeth," experience slight wear with each turn. Over time, the tips of the teeth gradually become blunt, making them insufficient to lift the internal spring leaves. If the spring leaves cannot be lifted, the key naturally cannot be turned. 2. Solution: In this situation, you can only use the spare key to start the car, and it is necessary to quickly make a new key using the spare key. Otherwise, if the spare key is also damaged, the entire key system will need to be replaced. To avoid damaging the key, please do not drop the key; do not get the key wet; do not expose the key to any type of magnetic field; and do not expose the key to high-temperature environments, such as the dashboard or engine hood, or direct sunlight.