Car keys can sustain a fair amount of abuse, but like most other parts of your car, they can wear down and break. The bad news is that, there is no way to fix a car key that broke in half and you’ll need to replace the key.
It may be tempting to perform a do-it-yourself repair like gluing the key back together, but you should avoid at-home repairs because they can cause even more damage.
Instead of repairing the key, you should visit a dealership or locksmith, and bring the broken key with you. Car keys are typically easy to replace, and a new key typically costs $100 to $200 but varies depending on your vehicle’s make and model. Some keys can cost as little as $50 to replace, while others can cost upwards of $500.