What an interesting question! A maturity benefit policy is a life insurance policy that pays an insured if they survive the policy term. Auto insurance offers liability protection in the event of a covered loss during the term of the policy. A life insurance payout can only happen once, while an auto policy can and will be used several times throughout your lifetime, so there is no such thing as a maturity benefit in the auto insurance world.
However, you may be thinking of a benefit that some insurance carriers advertise called a “safe driving bonus” or “no-claims bonus.” If you are incident-free the whole policy term, you may get a small refund check in the mail. Check with your agent to see if your carrier has this option.