Genuine OEM Honda (HRX2173HYA) (HRX2173HZA) (HRX2173VKA) Walk-Behind Lawn Mower Engines AIR Filter Cleaner Element (Engine Serial Numbers GJAAA-2851077 and up)

What It Is

This is the genuine OEM Honda air filter element for HRX2173HYA, HRX2173HZA, and HRX2173VKA walk-behind mowers. It traps dirt and debris before they enter the engine’s intake system, protecting the carburetor and cylinder from premature wear.

Fitment & Compatibility

• Exact fit for: Honda HRX2173HYA, HRX2173HZA, HRX2173VKA models only with engine serial numbers GJAAA-2851077 and up. Older HRX2173 variants (serial below that number) use a different filter.
• OEM vs aftermarket: This is genuine Honda, so no fitment or quality guesswork. Aftermarket filters may be cheaper but often seal poorly or have incorrect pleat density.
• Physical check: The filter is roughly 4.5 x 3.5 x 1.5 inches. If your current filter has a different shape or the foam pre-cleaner is separate, you have the wrong version.
• Deck size irrelevant: Fitment depends on engine serial number, not deck size (21-inch or 22-inch).

Key Things to Know

• Installation is tool-free: Pop the air cleaner cover, swap the old element, and re-secure the cover. Takes 2 minutes.
• Replace annually or every 100 hours—more often if you mow in dusty conditions. A clogged filter reduces power and can cause hard starting.
• Check the foam pre-cleaner if your mower has one; this part is the paper element only and does not include the foam outer layer.
• Common gotcha: The engine serial number is stamped on a metal plate near the rear of the mower, not on the air filter cover. Double-check before ordering.

Should You Buy It

If your HRX2173 has engine serial GJAAA-2851077 or higher and you want a guaranteed fit with zero mods, this is the right choice. It’s priced fairly for OEM quality, installs instantly, and eliminates the risk of aftermarket misfits. Ideal for owners who prefer reliability over saving a few dollars.