John Deere STX38 Air Filter: Part Number, Size & Cross Reference

Quick answer:

The John Deere STX38 mower primary engine air filter part number found is GY20574. Cross-reference filters include WIX 49010; NAPA 49010; Baldwin PA2020; Donaldson P181195; more listed below.

Primary air filterGY20574
Cross-referenceWIX 49010
Engine power13 hp

John Deere STX38 Air Filter Specs

Primary air filter part number GY20574
Secondary / safety air filter GY20574
Pre-filter M88571
Cross-reference filters WIX 49010; NAPA 49010; Baldwin PA2020; Donaldson P181195; FRAM CA10112; Stens 102-052
Number of air filter elements 3 elements (primary, secondary, pre-filter)
Engine model Kohler
Engine horsepower 13 hp
Engine displacement 24.3 cu in (0.4 L)

John Deere STX38 Air Filter Charts

Engine horsepower

This model

13 hp

Average

35 hp

Low

18 hp

High

66 hp

Engine displacement

This model

24.3 cu in

Average

100 cu in

Low

50 cu in

High

180 cu in

John Deere STX38 Air Filter FAQ

What air filter does the John Deere STX38 use? The primary engine air filter part number found for the John Deere STX38 is GY20574.
What air filter cross-references fit the John Deere STX38? Cross-reference filters found for the John Deere STX38 include WIX 49010; NAPA 49010; Baldwin PA2020; Donaldson P181195; FRAM CA10112; Stens 102-052.
Can I use an aftermarket air filter on the John Deere STX38? The John Deere STX38 has 6 cross-reference filters listed, starting with WIX 49010. Use them as aftermarket leads, not as a replacement for checking the original part number GY20574.
How many air filter elements are listed for the John Deere STX38? 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 STX38 air filter page? For the John Deere STX38, the engine specs found are 13 hp, 24.3 cu in (0.4 L). This is useful context when comparing similar models, but not a substitute for checking the filter number GY20574.
Should I order the John Deere STX38 air filter by size or part number? The OEM-style number GY20574 should be the main lookup value for the John Deere STX38; the cross-reference numbers are useful when shopping WIX, Baldwin, Donaldson or similar brands.
What should I confirm before buying a John Deere STX38 air filter? For the John Deere STX38, confirm GY20574 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 deere.com website before buying or fitting an air filter.