405143 Craftsman Mower Belt 532405143 Husqvarna Lawn Mower Deck Belt for AYP 46" Deck 584453101 21546607 Lawn Tractor Kevlar Belt 0.5" x 106" Aramid Cord

What It Is

This is a 0.5-inch wide, 106-inch long Kevlar-reinforced drive belt designed for 46-inch lawn tractor decks. It transfers power from the engine pulley to the mower blades on AYP (American Yard Products) built Craftsman and Husqvarna models.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: Must be a 46-inch deck. This belt will not fit 42-inch or 54-inch decks.
• OEM cross-references: Replaces Craftsman 405143, 532405143; Husqvarna 584453101, 21546607; AYP 584453101.
• Measure your old belt: Exact length is 106 inches, width is 0.5 inches. If your old belt is 105 or 107 inches, this will not fit.
• Brand fit: Works on most Craftsman and Husqvarna tractors with 46-inch AYP decks from the late 1990s through 2010s. Check your model number on the deck or frame—not just the engine brand.

Key Things to Know

• Kevlar construction: Aramid cord makes this belt more heat-resistant and longer-lasting than standard rubber belts, but it is slightly stiffer to install.
• Installation difficulty: Moderate. You must remove the deck and route the belt around all three spindle pulleys and the idler. A belt tool or long screwdriver helps.
• Common gotcha: The belt must be routed under the idler pulley, not over it. Routing it wrong causes slipping and rapid wear.
• No tension adjustment needed: This belt relies on the deck’s spring-loaded idler arm—no manual tensioner to set.

Should You Buy It

Buy this if you have a 46-inch AYP deck on a Craftsman or Husqvarna tractor and want a durable, OEM-replacement belt at a lower price than the dealer. Skip it if your deck size is different or if you need a belt for the transmission (this is a mower deck belt only).