E-Z GO Marathon models (1976 to 1993)
The serial number and manufacturer's number for these models can be found on a plate located under the glove box on the passenger's side of the vehicle. The serial number is either six or seven numbers and does not indicate the model year. The manufacturer's number does reflect the model year. This series will have one letter and three or four numbers which will include two numbers indicating the last two digits of the year it was manufactured.

The order of these numbers and one letter have changed several times over the years, but you should be able to figure it out.