Quick answer:
The Kubota BX1850 tractor primary engine air filter part number found is K1211-82320. Cross-reference filters include WIX 46449; Baldwin RS3715; Donaldson P822686. Service guidance is to check the air filter every 100 hours.
Primary air filterK1211-82320
Cross-referenceWIX 46449
Engine power18 hp
Service intervalCheck every 100 hours
Kubota BX1850 Air Filter Specs
| Primary air filter part number | K1211-82320 |
|---|---|
| Cross-reference filters | WIX 46449; Baldwin RS3715; Donaldson P822686 |
| Replacement interval | Check every 100 hours |
| Number of air filter elements | 1 element (primary) |
| Engine model | Kubota D722 |
| Engine horsepower | 18 hp |
Kubota BX1850 Air Filter Charts
Engine horsepower
Air filter service interval
Kubota BX1850 Air Filter FAQ
| What air filter does the Kubota BX1850 use? | The primary engine air filter part number found for the Kubota BX1850 is K1211-82320. |
|---|---|
| What air filter cross-references fit the Kubota BX1850? | Cross-reference filters found for the Kubota BX1850 include WIX 46449; Baldwin RS3715; Donaldson P822686. |
| Can I use an aftermarket air filter on the Kubota BX1850? | The Kubota BX1850 has 3 cross-reference filters listed, starting with WIX 46449. Use them as aftermarket leads, not as a replacement for checking the original part number K1211-82320. |
| How often should the Kubota BX1850 air filter be checked or replaced? | The service guidance found for the Kubota BX1850 is to check the air filter every 100 hours. That matches the reference average of 100 hours used for this class. |
| How many air filter elements are listed for the Kubota BX1850? | 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 Kubota BX1850 air filter page? | For the Kubota BX1850, the engine specs found are 18 hp. This is useful context when comparing similar models, but not a substitute for checking the filter number K1211-82320. |
| Should I order the Kubota BX1850 air filter by size or part number? | The OEM-style number K1211-82320 should be the main lookup value for the Kubota BX1850; the cross-reference numbers are useful when shopping WIX, Baldwin, Donaldson or similar brands. |
| What should I confirm before buying a Kubota BX1850 air filter? | For the Kubota BX1850, confirm K1211-82320 against the parts manual, then use the cross-reference list only after the OEM number matches. |
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.

