Quick answer:
The John Deere 5203S tractor primary engine air filter part number found is AT411949. Filter dimensions found include Inner diameter: 7.44 in / 189 mm. Service guidance is to replace the air filter every 250 hours.
Primary air filterAT411949
Filter sizeInner diameter: 7.44 in / 189 mm
Engine power56 hp
Service intervalReplace every 250 hours
John Deere 5203S Air Filter Specs
| Primary air filter part number | AT411949 |
|---|---|
| Secondary / safety air filter | AN403919 |
| Pre-filter | AT171854 |
| Air filter size | Inner diameter: 7.44 in / 189 mm |
| Inner diameter | 7.44 in / 189 mm |
| Replacement interval | Replace every 250 hours |
| Number of air filter elements | 3 elements (primary, secondary, pre-filter) |
| Engine horsepower | 56 hp |
| Engine displacement | 179 cu in (2.9 L) |
John Deere 5203S Air Filter Charts
Air filter dimensions
Engine horsepower
Engine displacement
Air filter service interval
John Deere 5203S Air Filter FAQ
| What air filter does the John Deere 5203S use? | The primary engine air filter part number found for the John Deere 5203S is AT411949. |
|---|---|
| What size is the John Deere 5203S air filter? | The air filter dimensions found for the John Deere 5203S are Inner diameter: 7.44 in / 189 mm. Use these dimensions as a fit check, but treat the part number as the main match. |
| How often should the John Deere 5203S air filter be checked or replaced? | The service guidance found for the John Deere 5203S is to replace the air filter every 250 hours. That is longer than the reference average of 200 hours for this class, so still shorten the interval when the machine is used in heavy dust. |
| How many air filter elements are listed for the John Deere 5203S? | This page lists a primary filter, a safety filter and a pre-filter: 3 elements (primary, secondary, pre-filter). Replace each only with the matching part number for that position. |
| Why include engine specs on a John Deere 5203S air filter page? | The engine data kept for the John Deere 5203S is 56 hp, 179 cu in (2.9 L). Use it as supporting context only; the actual filter match is still driven by the air-cleaner housing and part number AT411949. |
| Should I order the John Deere 5203S air filter by size or part number? | The part number AT411949 matters more than size alone on the John Deere 5203S. The listed dimensions helps confirm the filter looks physically consistent. |
| What should I confirm before buying a John Deere 5203S air filter? | For the John Deere 5203S, confirm AT411949 against John Deere parts information and use the listed dimensions of Inner diameter: 7.44 in / 189 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 deere.com website before buying or fitting an air filter.

