75 Pa.C.S. § 1721: Statute of limitations.

(a) General rule.--If benefits have not been paid, an action for first party benefits shall be commenced within four years from the date of the accident giving rise to the claim. If first party benefits have been paid, an action for further benefits shall be commenced within four years from the date of the last payment.

(b) Minors.--For minors entitled to benefits described in section 1711 (relating to required benefits) or 1712 (relating to availability of benefits), an action for benefits shall be commenced within four years from the date on which the injured minor attains 18 years of age.

(c) Definition.--As used in this section the term "further benefits" means expenses incurred not earlier than four years preceding the date an action is commenced.