Husqvarna Genuine 587100402 Grass Bag Only L421P Fits 587100408 OEM

What It Is

This is a genuine Husqvarna grass bag (part number 587100402) designed to replace the bag assembly on the L421P walk-behind mower. It’s a single bag unit for collecting clippings during mulching or bagging passes.

Fitment & Compatibility

• Mower Model: Husqvarna L421P only. Does not fit L421P with a different deck or other L-series mowers without confirmation.
• Deck Size: Works with the 21-inch steel deck on the L421P. Measure your bag mounting bracket width and hook spacing to verify.
• OEM vs Aftermarket: This is Husqvarna OEM, so it matches the original bag’s dimensions, attachment hooks, and cloth mesh. Aftermarket bags may differ in hook shape or bag capacity.
• Part Cross-Reference: Replaces OEM bag assembly 587100408 (the complete kit). This is the bag only—you may need the frame or adapter if yours is missing.
• Check Before Buying: Confirm your mower’s model number (stamped under seat or on deck) and measure the bag’s length and hook-to-hook distance. If your current bag has a different attachment style (e.g., pin vs. hook), this won’t fit.

Key Things to Know

• Build Quality: Thick, UV-resistant fabric with reinforced stitching. Holds up longer than cheap aftermarket bags, especially in sun exposure.
• Installation: Tool-free—slides onto the mower’s bag frame and hooks into place. Takes 2 minutes.
• Capacity: Holds about 1.5 bushels (enough for a typical suburban lawn). Clogs less than smaller bags if you mow dry grass.
• Gotcha: This is the bag only, not the full bag assembly. If your frame or hooks are bent or missing, you’ll need to buy the 587100408 kit or source separate parts.

Should You Buy It

Buy this if you own a Husqvarna L421P and need a direct, durable replacement for a torn or worn-out bag. It’s a perfect OEM match, so no trial-and-error with fitment. Skip it if you need a complete assembly (bag + frame) or are trying to fit it on a different mower model.