Quick answer:
The John Deere 66 tractor primary engine air filter part number found is RE46310. Cross-reference filters include WIX 49010; NAPA 49010; Baldwin PA3869; Donaldson P607365. Filter dimensions found include Outer diameter: 9 in / 230 mm; Inner diameter: 5.8 in / 147 mm.
Primary air filterRE46310
Cross-referenceWIX 49010
Filter sizeOuter diameter: 9 in / 230 mm
Engine power20 hp
John Deere 66 Air Filter Specs
| Primary air filter part number | RE46310 |
|---|---|
| Secondary / safety air filter | AH212295 |
| Cross-reference filters | WIX 49010; NAPA 49010; Baldwin PA3869; Donaldson P607365 |
| Air filter size | Outer diameter: 9 in / 230 mm; Inner diameter: 5.8 in / 147 mm |
| Outer diameter | 9 in / 230 mm |
| Inner diameter | 5.8 in / 147 mm |
| Number of air filter elements | 2 elements (primary, secondary) |
| Engine horsepower | 20 hp |
| Engine displacement | 30.5 cu in (0.5 L) |
John Deere 66 Air Filter Charts
Air filter dimensions
Engine horsepower
Engine displacement
John Deere 66 Air Filter FAQ
| What air filter does the John Deere 66 use? | The primary engine air filter part number found for the John Deere 66 is RE46310. |
|---|---|
| What air filter cross-references fit the John Deere 66? | Cross-reference filters found for the John Deere 66 include WIX 49010; NAPA 49010; Baldwin PA3869; Donaldson P607365. |
| Can I use an aftermarket air filter on the John Deere 66? | The John Deere 66 has 4 cross-reference filters listed, starting with WIX 49010. For aftermarket buying, compare brand part number, dimensions, seal shape and air-cleaner housing fit. |
| What size is the John Deere 66 air filter? | The air filter dimensions found for the John Deere 66 are Outer diameter: 9 in / 230 mm; Inner diameter: 5.8 in / 147 mm. Use these dimensions as a fit check, but treat the part number as the main match. |
| How many air filter elements are listed for the John Deere 66? | This page lists 2 elements (primary, secondary). That means the safety element should be treated separately from the outer primary air filter. |
| Why include engine specs on a John Deere 66 air filter page? | Engine specs found for the John Deere 66 include 20 hp, 30.5 cu in (0.5 L). Those specs help identify the tractor class, but the air filter should still be matched by part number RE46310. |
| Should I order the John Deere 66 air filter by size or part number? | Use RE46310 as the main match for the John Deere 66. The cross-reference list helps find aftermarket options, while the measured dimensions helps avoid ordering a filter that does not seat correctly. |
| What should I confirm before buying a John Deere 66 air filter? | For the John Deere 66, confirm RE46310, at least one listed cross-reference, and the dimensions value of Outer diameter: 9 in / 230 mm; Inner diameter: 5.8 in / 147 mm against the actual filter before ordering. |
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.

