Generally speaking, if you try to file a personal injury claim for a car accident more than two years after the date the accident occurred, the claim will be denied. However, there are some instances where exceptions may be made. If you were left mentally incapacitated from your injuries and unable to file your claim in time, you might still be allowed to file. You also may be given more time to file if the person you are bringing the claim against is unavailable because they are mentally incapacitated themselves, in prison, in another state or out of the country. Minors are also granted an extension to the statute of limitations and have until two years after the day they turn eighteen.