Carchex offers a variety of coverage plans, each with its own duration that can vary depending on the specific plan chosen. Typically, Carchex's warranty coverage ranges from one year to seven years. The duration of the coverage can also be measured in terms of mileage, which commonly spans between 12,000 to 250,000 miles, depending on the plan selected. It is important to note that the coverage can be tailored to suit various customer needs. The factors that influence the duration of the plan include the age of the vehicle, its mileage at the time of purchasing the coverage, and the specific terms and conditions of the plan itself. For a comprehensive understanding of the duration options available, it would be wise to visit Carchex's official website or review the detailed information provided for each specific plan.