John Deere Original Equipment Air Filter GY20661 – OEM Replacement

Overview

The John Deere Original Equipment Air Filter GY20661 is designed to match the original performance and fit for a broad range of tractors and walk-behind mowers. This OEM part replaces earlier identifiers M145944, M131303, and AM124458, making it a convenient option when you need a trusted, factory-approved filter for daily lawn care and maintenance tasks.

Key compatibility at a glance

Designed to work across a wide spectrum of John Deere equipment and select brands, this filter is commonly paired with gear from multiple series and deck configurations. The intent is to provide a reliable seal and a consistent airflow path so your engine receives clean intake air during typical mowing sessions and light seasonal workloads.

• OEM part number GY20661; replaces prior MPNs M145944 M131303 AM124458
• Compatible with John Deere, Sabre, and Scotts tractors and walk-behind mowers
• Fit examples include LT150, LT160, LX255, LX266, GT225, GS75, GS45, 7G18 deck, and related configurations
• Also covers LT150 with 38 inch or 42 inch decks, L110 series, LT160 44 inch/42 inch, and mulching or convertible decks
• Additional fits span GT225, GS75/GS45 lines, and various deck and tire configurations

What you can expect in real-world use

Using an OEM air filter helps maintain the engine’s intake air quality, which supports stable performance and reduces the chance of unfiltered debris entering the system. The design emphasizes a secure seal and consistent airflow without requiring special tools for installation. Results depend on your machine, maintenance habits, and operating conditions, so consider this filter as a dependable part of your regular upkeep rather than a guaranteed outcome.

• OEM design ensures a proper fit with minimal modification
• Sturdy construction supports routine maintenance cycles and typical outdoor workload
• Simple replacement helps keep maintenance efficient and predictable

How to verify compatibility and install

Before buying, consult your machine’s owner manual to confirm that part number GY20661 matches your model. During replacement, ensure the new filter forms a tight seal with the housing to prevent unfiltered air from bypassing the filter media.

Note that the model list can be extensive and varies by configuration. Use the manual as the definitive reference for compatibility and installation steps to ensure an accurate fit for your equipment.