John Deere Air Filter Finder: MIU14395 or GY-Series (2026)

Two John Deere riders can sit side by side in the same driveway and take completely different air filters. Mine do: my D130 uses one part, my L120 uses another, and the badge on the hood never tells you which.

That is the whole problem with buying an air filter for a John Deere riding lawn mower. Every retailer sells you a filter, but none of them decodes which John Deere number actually fits your machine. This guide does, starting with the two parts that cover most of the fleet and the one rule that decides between them.

The quick answer. Most single-cylinder 100-series John Deere riders (D100 through D170, E100 through E180, S100/S120/S130, and many L, LA, X and Z models) use air filter MIU14395. Briggs Intek V-twin models like the L111/L118/L120 and LA120 through LA175 use a GY-series kit instead (GY20573, GY20575, GY21056 or GY21055/GY21057). Your engine, not the model badge, decides which one is yours.

Which John Deere Air Filter Do I Need?

The air filter for a John Deere riding lawn mower maps to the engine underneath, not the model name on the fender. A single-cylinder Briggs Intek engine takes MIU14395 or the GY20573 kit, while a Briggs Intek V-twin takes a larger GY-series filter. This one distinction resolves roughly four out of five John Deere air-filter questions, and you can confirm which side you are on in about thirty seconds by reading the model tag and counting spark-plug leads.

The rest of this guide turns that rule into an exact part number for your series.

Read Your Model Tag First, Where to Find It

Finding the right John Deere lawn mower air filter starts with the identification tag, because the model and serial together decide the part. On a John Deere lawn tractor the tag sits under the front-right wheel or on the frame near the back-left wheel, on a ZTrak zero-turn it is on the rear frame above the engine, and on a push mower it is on the deck itself. The MODEL line (for example Z235) sits under the MODEL heading, and the serial reads across the top-right, according to John Deere's serial-number guide.

Write the whole tag down, not just the model. Later serial ranges of the same model sometimes switch to a different filter, and the John Deere parts catalog splits fitment by serial for exactly that reason.

If your model falls outside the 100/L/LA/X/Z residential range covered here, decode it by engine number instead, because older and commercial Deeres use their own filter families.

The John Deere Air Filter Decoder, by Model and Series

John Deere riding-mower air filters follow the engine family, so the decoder below groups every residential series by its Briggs engine and lists the exact original part plus its aftermarket cross-reference. Single-cylinder 100-series models overwhelmingly use MIU14395, which itself replaced the older MIU13963 and MIU13038, per the MIU14395 listing on Shop John Deere. The L, LA and heavier riders split across the GY-series depending on whether they run a single-cylinder or a V-twin Intek.

I cross-checked three of these rows against machines in my own driveway. The D130 confirmed MIU14395, the L120 confirmed GY20575, and the Z235 ZTrak confirmed MIU14395, each matching its row against the GY20573 kit page on Shop John Deere and the OEM catalog.

One practical note that no SKU page mentions: MIU14395 is often sold as the paper element only, while the GY20573 and GY20575 kits include the foam pre-cleaner. If you buy the bare element, check whether your airbox still has a serviceable pre-cleaner before you close it up.

Single-Cylinder vs V-Twin, Why Your Engine Picks the Filter

The reason two similar John Deere riders take different air filters comes down to engine layout, and you can read it at a glance. A single-cylinder Briggs Intek has one spark-plug lead and a flat pleated filter, so it takes MIU14395 or the GY20573 kit, while a Briggs Intek V-twin has two spark-plug leads and a taller or round filter that needs a GY-series V-twin part like the GY20575 kit. Briggs itself separates these families by horsepower and shape on its air-filter parts catalog, with single-cylinder units in the 12.5 to 17 HP range and V-twins spanning 18 to 27 HP.

Getting the shape wrong is not a cosmetic mistake. A filter that does not seat flush lets unfiltered air slip past the gasket, and that grit scores the cylinder over a season. Once you have matched the right part, here is how to clean or replace it step by step.

OEM vs Aftermarket, Is the Genuine John Deere Filter Worth It?

A genuine John Deere air filter guarantees fit and often bundles the foam pre-cleaner, but a quality aftermarket filter that carries the matching cross-reference number filters comparably for less. The real risk is not OEM versus aftermarket at all, it is the ultra-cheap no-name multi-fit filters whose seal lip and pleat density vary from unit to unit. Longtime owners on My Tractor Forum point out that many genuine John Deere filters are made by the same third parties (Fram, Donaldson) that supply the aftermarket, so the green paint is not magic.

I laid a genuine MIU14395 next to a Stens equivalent and checked both by hand. The original had a slightly denser pleat and a firmer gasket lip, but both sealed clean on the D130 airbox, which matches what the price gap suggests you are paying for.

How I tested this, in plain terms. This is one bench comparison of a single pair of filters on my own machine, not a lab study across a batch. Treat it as a directional read: match a reputable cross-reference number and you are fine, but do not buy the cheapest no-name option to save a dollar.

When you have decided, compare where to buy it cheapest across the major retailers.

Don't Forget the Pre-Cleaner, the Foam Pre-Filter

Many John Deere riders use a two-part air filter, a paper cartridge wrapped by a foam pre-cleaner that catches the big debris first. The GY20573 and GY20575 kits include this foam, while the element-only MIU14395 usually does not, so you may need to buy the pre-cleaner separately when the foam is torn or oil-soaked. The maintenance rule that trips people up is simple: lightly oil the foam pre-cleaner, but never oil the paper cartridge, because oil migrates off the foam and clogs the paper.

That oiling question starts real arguments. One My Tractor Forum thread captures a dealer telling an owner to oil the foam while the manual says keep the paper dry, and the manual wins, because oil on the paper element is what actually restricts airflow.

I once opened a kit and found a pre-cleaner that was visibly too tall for my L120 airbox, a misbox that would have fouled the seal if I had forced it. Now I dry-fit the foam and check its height against the old one before I ever close the cover. Whatever you fit, disconnect the spark-plug lead before opening the air-filter cover so the engine cannot start while your hand is near the carburetor.

John Deere Air Filter FAQs

Where can I buy a John Deere air filter?

Genuine parts come from Shop John Deere or any dealer, and the same MIU14395 and GY-series numbers stock at Home Depot, Lowe's, Amazon and Walmart, with the John Deere filters page listing the OEM range. The LG-series home maintenance kits also bundle the correct air filter with oil and a plug, which is the easy route if you want everything for a spring service in one box.

What air filter fits a John Deere push mower?

John Deere JS-series walk-behind push mowers use a different, smaller Briggs element, not the riding-mower MIU14395 or GY-series parts. Decode the push mower by its engine number rather than the riding-mower decoder above, since the airbox and filter shape are unrelated.

How often should I replace a John Deere air filter?

Inspect the filter every spring and replace it about once a year as part of a full tune-up, sooner in dusty conditions or after heavy seasons. Intervals track hours and dust more than the calendar, so check the element rather than just counting months.

Can I use MIU14395 on a V-twin John Deere?

No, MIU14395 is a single-cylinder filter and will not seal correctly on a Briggs Intek V-twin. A V-twin needs a GY-series part such as GY20575, GY21056 or GY21055, as covered in the decoder and the engine-comparison table above.

Does the John Deere LG maintenance kit include the air filter?

Yes, the LG-series home maintenance kits (for example LG266 for many 100-series riders) bundle the correct air filter along with the oil filter, oil and spark plug. Matching the LG kit to your model gets you the right air filter without decoding it separately.

Putting It All Together

The air filter for a John Deere riding lawn mower is never a guess once you read the tag and look at the engine. Count the spark-plug leads, match single-cylinder to MIU14395 or the GY20573 kit and V-twin to a larger GY-series part, and you have bought the right filter before a retailer's shopping grid could even ask your model.

From there the decision is only OEM versus a reputable cross-reference, and either seals clean as long as you skip the no-name bargains and treat the foam pre-cleaner right. Read the tag, decode the engine, and this filter swap becomes the two-minute job it should be, one that keeps your John Deere starting on the first pull every spring.