Tesla serial numbers are 11 digits and alphanumeric, and are often found affixed to Tesla products via a label or engraving.
            
        
        Using the above serial number (T12J000683) as an example, Tesla serial numbers can be decoded in the following way:
Digit 1
| Manufacturer | 
|---|
| T = Tesla | 
Digits 2-3
| Year of Manufacture | 
|---|
| 12 = (2012, 2013, etc.) | 
Digit 4
| Month of Manufacture | 
|---|
| J = (A is January, B is February, etc.) | 
Digits 5-11
| Production Number | 
|---|
| 000683 = (000683 is the 683rd part with that part number) | 
Therefore, T12J000683 was manufactured by Tesla in October, 2012 and was the 683rd part with that part number.