Ohio Rev. Code Ann. § 1345.73
(A) Except as provided in division (B) of this section, it shall be presumed that a reasonable number of attempts have been undertaken by the manufacturer, its dealer, or its authorized agent to conform a motor vehicle to any applicable express warranty if, during the period of one year following the date of original delivery or during the first eighteen thousand miles of operation, whichever is earlier, any of the following apply:
(B)