954-04329A Deck Belt for 54" Deck MTD Cub-Cadet Troy Bilt Mower ZT1-54 RZT- L54 S54 LX54 ZT-S54 Z6900, Replace Parts Number 954-04329 754-04329

What It Is

This is a replacement deck belt for 54-inch cutting decks on select MTD, Cub Cadet, and Troy-Bilt zero-turn mowers. It drives the blades from the engine pulley and is designed for residential/commercial mowing.

Fitment & Compatibility

• Deck size: 54-inch only. Measure your belt length; OEM spec is 1/2" x 140-5/8".
• Models: Works with Cub Cadet ZT1-54, RZT L54, S54, LX54, ZT-S54, Z6900; Troy-Bilt Mustang ZT1-54, Bronco 54; MTD 54-inch ZTRs.
• OEM cross-numbers: 954-04329, 754-04329. Verify your mower’s part number matches one of these.
• Aftermarket note: This is a non-OEM belt. Check that your mower uses a standard A-section belt (not Kevlar/cogged). If your original had a special grip pattern, this may not match exactly.

Key Things to Know

• Quality: 4.4 stars from 455 reviews—generally reliable for normal use, but not as durable as OEM for heavy commercial duty.
• Installation: Moderate difficulty. You’ll need to remove the deck or use a spring tool to tension the idler pulley. Watch for belt routing diagrams online.
• Common gotcha: The belt may be slightly tighter than OEM; if your mower has a spring-loaded idler, it will adjust. If not, you may need to loosen the deck mounting bolts.
• Lifespan: Expect 1-2 seasons with regular mowing. Check for fraying after 50 hours.

Should You Buy It

This is a solid budget-friendly replacement for homeowners with a 54-inch MTD/Cub Cadet/Troy-Bilt zero-turn who want to save $10-15 over OEM. Not ideal for commercial mowing or if you need exact OEM fitment—stick with the factory belt for heavier use.