964-04154A Lawn Mower Grass Bag Replacement for MTD Craftsman Lawn Mower Bag 964-04154 Compatible with 21" Mower Series 11A and 12A (Bag Only, Without Grass Catcher Frame or Other Parts)

What It Is

This is an aftermarket replacement grass bag for select 21-inch MTD and Craftsman walk-behind mowers. It replaces OEM part 964-04154 and is designed to catch clippings on side-discharge mowers from the Series 11A and 12A lineup. It does not include the grass catcher frame or any mounting hardware—just the bag itself.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Only fits 21-inch mower decks. Anything larger or smaller will not attach correctly.
• Model series: Confirmed compatible with MTD/Craftsman Series 11A and 12A mowers. Look for “11A” or “12A” in your mower’s model number (e.g., 11A-123-456).
• Frame check: This bag requires the original grass catcher frame (metal or plastic) to attach to the mower. If your frame is missing, bent, or broken, you’ll need to buy a separate frame assembly (often sold as OEM part 964-04154A frame kit). Measure your existing frame’s hook spacing and bag slot width—most 21-inch MTD frames use a 2-inch-wide slot, but verify yours matches.

Key Things to Know

• Quality: The bag is made of durable polyester mesh, but some reviews note the zipper or seams may wear faster than OEM. Expect 1–2 seasons of regular use.
• Installation: Simple swap—remove old bag, slide this one onto your existing frame, and secure the drawstring or clips (if included). No tools needed.
• Common gotcha: The bag may be slightly smaller than OEM, reducing capacity slightly. If you have a large yard (over 1/4 acre), you may need to empty it more often.
• Missing parts: This is bag-only. Double-check your frame and mounting clips are intact before buying. If your frame is damaged, this bag won’t fit properly.

Should You Buy It

Buy this if you have a 21-inch MTD/Craftsman Series 11A or 12A mower, your original bag ripped or wore out, and your frame is still in good shape. Skip it if you need a complete catcher system (frame + bag) or if your mower is from a different brand or deck size. At $29.99, it’s a budget-friendly fix for a common failure point.