Unless you purchased and extended warranty, this period is one year after the purchase date. The RMA process begins with you contacting AKCPs Support Team at [email protected] who will determine if the sensor is faulty. Please include the sensors serial number when contact the AKCP Support Team If the sensor is determined to be faulty and is confirmed to still be covered under your warranty plan, then AKCP will provide you a replacement at no cost Please contact the AKCP Support Team for instructions on the RMA process