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John Deere Engine Serial Number Decoder

Understand your diesel engine serial number quickly with the John Deere Serial Number Decoder from Diesel Parts Direct. Ordering the correct parts for your John Deere engine can be complicated, but we’ve simplified the process with our handy serial number lookup chart. Starting with a simple diagram of the John Deere serial number plate, you’ll easily understand the different components including Factory Prefix, Emissions/Aspiration Code, Engine Model and Serial Number Sequence. It’s easy. Really.

After the John Deere Serial Number Decoder, we take it a step beyond to further explain additional details around aspiration codes, emission codes not to mention differences between 300 Series and Powertech engines. When you’re done, you’ll be well equipped to choose the right John Deere parts for the job.

When you need help decoding serial numbers for John Deere engines, visit Diesel Parts Direct.

Serial Number Breakdown

Sample John Deere ESN

Emission Codes for Newer Engines

Emission Code
Emission Level
B
Non-Certified
C, E or F
Tier 1/Stage I
G, J or K
Tier 2/Stage II
L, M, N or P
Tier 3/Stage III A
R
Interim Tier 4/Stage III B
U
Final Tier 4/Stage IV

Aspiration Codes for Older Engines

Aspiration Code
Aspiration Type
A
Turbocharged, air to coolant aftercooled
D
Naturally aspirated
H
Turbocharged, air to air aftercooled
S
Turbocharged, air to sea water aftercooled
T
Turbocharged

Is your engine a 300 Series or a Powertech?

First generation 300 Series engines use the same model numbers as the newer Powertech; their technology is extremely different so very few parts are interchangeable. When checking your ESN, here is how you would know which type of engine you have:

Prefix
300 Series
Powertech
TO
ESN up to 699999
ESN 700000 and up
CD
ESN up to 499999
ESN 500000 and up
PE
 
ESN 001000 and up

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