The Kubota Z121S tractor primary engine air filter part number found is K1211-82110. Filter dimensions found include Height: 5.5 in / 140 mm; Outer diameter: 6.5 in / 165 mm; Inner diameter: 2.5 in / 64 mm. Service guidance is to check the air filter every 50 hours.
Primary air filterK1211-82110
Filter height5.5 in / 140 mm
Engine power21 hp
Service intervalCheck every 50 hours
Kubota Z121S Air Filter Specs
Primary air filter part number
K1211-82110
Secondary / safety air filter
32721-58242
Air filter size
Height: 5.5 in / 140 mm; Outer diameter: 6.5 in / 165 mm; Inner diameter: 2.5 in / 64 mm
Filter height
5.5 in / 140 mm
Outer diameter
6.5 in / 165 mm
Inner diameter
2.5 in / 64 mm
Replacement interval
Check every 50 hours
Number of air filter elements
3 elements (primary, secondary, pre-filter)
Engine horsepower
21 hp
Kubota Z121S Air Filter Charts
Air filter dimensions
Height
5.5 in
Outer diameter
6.5 in
Inner diameter
2.5 in
Engine horsepower
This model
21 hp
Average
23 hp
Low
12 hp
High
40 hp
Air filter service interval
This model
50 hr
Average
50 hr
Low
25 hr
High
100 hr
Kubota Z121S Air Filter FAQ
What air filter does the Kubota Z121S use?
The primary engine air filter part number found for the Kubota Z121S is K1211-82110.
What size is the Kubota Z121S air filter?
The air filter dimensions found for the Kubota Z121S are Height: 5.5 in / 140 mm; Outer diameter: 6.5 in / 165 mm; Inner diameter: 2.5 in / 64 mm. Use these dimensions as a fit check, but treat the part number as the main match.
How often should the Kubota Z121S air filter be checked or replaced?
The service guidance found for the Kubota Z121S is to check the air filter every 50 hours. That matches the reference average of 50 hours used for this class.
How many air filter elements are listed for the Kubota Z121S?
This page lists 3 elements (primary, secondary, pre-filter). That means the safety element should be treated separately from the outer primary air filter.
Why include engine specs on a Kubota Z121S air filter page?
The engine data kept for the Kubota Z121S is 21 hp. Use it as supporting context only; the actual filter match is still driven by the air-cleaner housing and part number K1211-82110.
Should I order the Kubota Z121S air filter by size or part number?
For the Kubota Z121S, use K1211-82110 as the main buying number and use the dimensions value of Height: 5.5 in / 140 mm; Outer diameter: 6.5 in / 165 mm; Inner diameter: 2.5 in / 64 mm only as a secondary fit check.
What should I confirm before buying a Kubota Z121S air filter?
For the Kubota Z121S, confirm K1211-82110 against the Kubota parts source and use the listed dimensions of Height: 5.5 in / 140 mm; Outer diameter: 6.5 in / 165 mm; Inner diameter: 2.5 in / 64 mm as a physical check.
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 kubotausa.com website before buying or fitting an air filter.
