5/8" X175.875" Deck Belt for Toro 115-4971, 133-1167, ZX5400, ZX5420, ZX5450, MX5480 Zero Turn Mowers with 54" Mower Decks

What It Is

This is a 5/8-inch wide by 175.875-inch long replacement deck belt for Toro zero-turn mowers with 54-inch decks. It drives the blades on models like the ZX5400, ZX5420, ZX5450, and MX5480, and replaces OEM part numbers 115-4971 and 133-1167.

Fitment & Compatibility

Before buying, confirm your mower has a 54-inch deck and is a Toro ZX or MX series zero-turn (not a TimeCutter or Titan). Cross-check your current belt’s part number: if it’s 115-4971 or 133-1167, this belt fits. Measure the old belt length (end-to-end, laid flat) – it should be exactly 175.875 inches. If your deck uses a different OEM number (e.g., 108-1539), this belt won’t work. Also verify the belt routing diagram under your deck matches the standard 54-inch Toro pattern (two idler pulleys, three blades).

Key Things to Know

• Quality: This is an OEM Toro belt, not a generic aftermarket. It’s built with Kevlar-reinforced cord for longer life and less stretch under load.
• Installation difficulty: Moderate – you’ll need to release the spring-loaded idler pulley, route the belt around all three spindles and two idlers, then re-tension. A belt tool or 1/2-inch ratchet helps.
• Common gotchas: The belt must be routed inside the deck’s belt keepers (metal guides) to avoid slipping. If your old belt broke, inspect all pulleys for damage or debris before installing the new one.
• Life expectancy: Expect 150–300 hours of mowing, depending on conditions. Replace if you see fraying, cracks, or glazing.

Should You Buy It

If you own a Toro ZX5400, ZX5420, ZX5450, or MX5480 with a 54-inch deck and need a direct OEM replacement, this belt is the right choice. It’s durable, fits perfectly, and eliminates guesswork with aftermarket belts. Skip it if you have a different deck size or a non-Toro mower.