Engine Serial Number Identification

ENGINES MANUFACTURED BEFORE JUNE 2012

IMPORTANT: 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.

OLD FORMAT

4-6 numbers that are sequential with no breaks for production month or year

NEW FORMAT (starting 1997)

Alpha-numeric (e.g. XJ5050 or 4J5050) with breaks for production month and year

First Digit = Production Year

1997199819992000200120022003200420052006200720082009
VWXY123456789
2010201120122013201420152016201720182019202020212022
ABCDEFGHJKLMN

Second Digit = Production Month

JanFebMarAprMayJunJulAugSepOctNovDec
ACEGJLNQSUWY
BDFHKMPRTVXZ
* The letters "I" and "O" are not used in serial numbers

ENGINES MANUFACTURED JUNE 1, 2012 AND AFTER

Engine Serial Number Rule (7 digits)
Starting June 1, 2012 the engine serial number will have 7 digits (currently 6 digits) and will be completely unique. This means that the engine serial numbers are mutually exclusive regardless of production plant.

e.g. Stamped Engine Serial Number

e.g. Standard Engine Serial Number

ENGINE SERIES:

NumberSeries
105 Series (Including WG)
2V3 Series
4SM Series (Including WG)
5Air Cooled Gasoline
6GZ, OC, AC, E Series
703 Series
807 Series

YEAR OF PRODUCTION:

Alphabet or NumberYear
12001
22002
32003
42004
52005
62006
72007
82008
92009
A2010
B2011
C2012
D2013
E2014
F2015
G2016

MONTH OF MANUFACTURE

MonthSequence number
JanuaryA0001~A9999B0001~BZ999
FebruaryC0001~C9999D0001~DZ999
MarchE0001~E9999F0001~FZ999
AprilG0001~G9999H0001~HZ999
MayJ0001~J9999K0001~KZ999
JuneL0001~L9999M0001~MZ999
JulyN0001~N9999P0001~PZ999
AugustQ0001~Q9999R0001~RZ999
SeptemberS0001~S9999T0001~TZ999
OctoberU0001~U9999V0001~VZ999
NovemberW0001~W9999X0001~XZ999
DecemberY0001~Y9999Z0001~ZZ999