The year of manufacture is coded into a serial number that can be found on every Maytag washing machine. Locate the coded number on the back of the machine behind the control panel, on the left side of the back frame or on the inside of the washer lid.
An example of a Maytag washer serial code is 15114672XB. The two letters at the end of the sequence indicate the year and month the washer was built. X can indicate 1989 or 2013, as years of manufacture are represented by a non-alphabetical sequence of letters that cycle every 12 years. B always stands for the month of January. A complete breakdown of the Maytag letter codes can be found at Electrical-Forensics.com.