The John Deere D125 tractor primary engine air filter part number found is GY21435.
Primary air filterGY21435
Engine power20 hp
John Deere D125 Air Filter Specs
Primary air filter part number
GY21435
Number of air filter elements
1 element (primary)
Engine model
Briggs & Stratton
Engine horsepower
20 hp
Engine displacement
40 cu in (0.66 L)
John Deere D125 Air Filter Charts
Engine horsepower
This model
20 hp
Average
24 hp
Low
12 hp
High
40 hp
Engine displacement
This model
40 cu in
Average
50 cu in
Low
25 cu in
High
80 cu in
John Deere D125 Air Filter FAQ
What air filter does the John Deere D125 use?
The primary engine air filter part number found for the John Deere D125 is GY21435.
How many air filter elements are listed for the John Deere D125?
This page confirms 1 element (primary). No separate safety or pre-filter part number was found for this model, so inspect the actual air-cleaner housing before assuming it uses only one piece.
Why include engine specs on a John Deere D125 air filter page?
The engine data kept for the John Deere D125 is 20 hp, 40 cu in (0.66 L). Use it as supporting context only; the actual filter match is still driven by the air-cleaner housing and part number GY21435.
Should I order the John Deere D125 air filter by size or part number?
The important buying value for the John Deere D125 is GY21435. Use the parts manual or dealer lookup if your machine has a different engine or air-cleaner housing.
What should I confirm before buying a John Deere D125 air filter?
For the John Deere D125, confirm GY21435 against the parts manual or official John Deere lookup because air-cleaner parts can change by serial range.
Official information note
Air filter fit can change by engine, serial number, production year and air-cleaner housing. Check the operator manual, parts manual and official deere.com website before buying or fitting an air filter.
