Michigan legislation provides legal protection for consumers who purchase or lease a new vehicle that is later discovered to have defects. The state's Consumer Protection office details the law here:  

https://www.michigan.gov/consumerprotection/protect-yourself/consumer-alerts/auto/lemon-law

Michigan's Lemon Law doesn't apply to most used vehicles. The exception is used vehicles "covered by a manufacturer’s express warranty at the time of purchase or lease."

You can read Michigan's Lemon Law here.