Serial Number Identification
Always obtain the serial number when possible. The serial number can help determine the engine model and also help determine the correct service parts and changes based on serial number breaks.
Where to Find Engine Serial Number
Engines Manufactured Before June 2012
Serial Number Format Before 1997
4-6 numbers that are sequential with no breaks for production month or year.
Serial Number Format After 1997-May 2012
Alpha-numeric (e.g., XJ5050 or 4J5050) with breaks for production month and year.
First Digit = Production Year
| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 |
| V | W | X | Y | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
| A | B | C | D | E | F | G | H | J | K | L | M | N |
Second Digit = Production Month
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| A | C | E | G | J | L | N | Q | S | U | W | Y |
| B | D | F | H | K | M | P | R | T | V | X | Z |
* The letters “I” and “O” are not used in Kubota engine serial numbers.
Engines manufactured June 1, 2012, and after
Engines produced after June 1, 2012, have 7 digits and are completely unique. This means that the engine serial numbers are mutually exclusive regardless of production plant.
Examples of Kubota Engine Serial Numbers
Engine Series
| Number | Number Series |
|---|---|
| 1 | 05 Series (including WG) |
| 2 | V3 Series (including WG) |
| F | 05 Series (CRS) |
| G | 09 Series |
| 4 | SM Series (including WG) |
| 5 | Air Cooled Gasoline |
| 6 | GZ, OC, AC, E Series |
| 7 | 03 Series (including WG) |
| 8 | 07 Series |
Year of Production
| Letter or Number | Year |
|---|---|
| 1 | 2001 |
| 2 | 2002 |
| 3 | 2003 |
| 4 | 2004 |
| 5 | 2005 |
| 6 | 2006 |
| 7 | 2007 |
| 8 | 2008 |
| 9 | 2009 |
| A | 2010 |
| B | 2011 |
| C | 2012 |
| D | 2013 |
| E | 2014 |
| F | 2015 |
| G | 2016 |
| H | 2017 |
| J | 2018 |
| K | 2019 |
| L | 2020 |
| M | 2021 |
| N | 2022 |
| P | 2023 |
| R | 2024 |
| S | 2025 |
| T | 2026 |
| V | 2027 |
Month of Manufacture
| Month | 1st Unit~9999th Unit | 10000th Unit~19998th Unit | 19999th Unit~20997th Unit | 20998th Unit~21996th Unit |
|---|---|---|---|---|
| January | A0001~A9999 | B0001~BZ999 | BA001~BA999 | BB001~BB999 |
| February | C0001~C9999 | D0001~DZ999 | DA001~DA999 | DB001~DB999 |
| March | E0001~E9999 | F0001~FZ999 | FA001~FA999 | FB001~FB999 |
| April | G0001~G9999 | H0001~HZ999 | HA001~HA999 | KB001~KB999 |
| May | J0001~J9999 | K0001~KZ999 | KA001~KA999 | KB001~KB999 |
| June | L0001~L9999 | M0001~MZ999 | MA001~MA999 | MB001~MB999 |
| July | N0001~N9999 | P0001~PZ999 | PA001~PA999 | PB001~PB999 |
| August | Q0001~Q9999 | R0001~RZ999 | RA001~RA999 | RB001~RB99 |
| September | S0001~S9999 | T0001~TZ999 | TA001~TA999 | TB001~TB999 |
| October | U0001~U9999 | V0001~VZ999 | VA001~VA999 | VB001~VB999 |
| November | W0001~W9999 | X0001~XZ999 | XA001~XA999 | XB001~XB999 |
| December | Y0001~Y9999 | Z0001~ZZ999 | ZA001~ZA999 | ZB001~ZB999 |
*Alphabetical Letters “I” and “O” are not used.