Mo. Rev. Stat. § 407.565

For the purposes of sections 407.560 to 407.579, if a new motor vehicle does not conform to all applicable express warranties, and the consumer reports the nonconformity to the manufacturer, or its agent, during the term of such express warranties, or during the period of one year following the date of original delivery of the new motor vehicle to the consumer, whichever period expires earlier, the manufacturer, or its agent, shall make such repairs as are necessary to conform the new vehicle to such express warranties, notwithstanding the fact that such repairs are made after the expiration of such term or such one-year period.