You should always be proactive in asserting your legal rights. Do not wait to file your claim! In order to file your timely claim, it must be brought within four (4) years from either the date you learned the vehicle was a lemon or from the date the warranty expired, whichever comes first. The date you “learned” the vehicle was a Lemon is a disputable issue that should be litigated by a competent Lemon Lawyer and is based on facts and circumstances.