46" Deck Belt 954-04325 / Kevlar Cord / 1/2" x 125" - Compatible with MTD CUB Cadet 754-04325 RZT46 TZT-L46 RZT-S46

What It Is

This is a replacement 46-inch deck drive belt (1/2" x 125") reinforced with Kevlar cord, designed for MTD and Cub Cadet zero-turn mowers with 46" fabricated decks, including the RZT46, TZT-L46, and RZT-S46 series.

Fitment & Compatibility

Before buying, confirm your mower’s deck size is exactly 46 inches and that the belt measures 1/2" wide by 125" long. This belt replaces OEM part numbers 954-04325 and 754-04325. It fits Cub Cadet RZT46, TZT-L46, RZT-S46, and many MTD-built zero-turn models with similar decks. Check your old belt’s part number stamped on the back, or measure the belt length (lay flat, measure end-to-end). Do not assume all 46" decks use the same belt—some use 126" or 1/2" x 126" variants. Also verify your deck has a single-belt (not dual-belt) spindle system.

Key Things to Know

• Kevlar cord vs. standard: Kevlar reinforcement improves durability under high load, but it’s stiffer than standard belts—expect a slightly tighter fit during installation.
• Installation difficulty: Moderate. You’ll need to remove the deck (or at least the belt cover/guide), route around three spindles and two idler pulleys, and use a wrench to tension the idler arm. A belt tool or pry bar helps.
• Common gotcha: The 125" length is critical—too short and the belt won’t reach; too long and it slips or throws. Double-check your old belt length if your deck is aftermarket or modified.
• Break-in period: New belt may squeak or vibrate for the first 15–30 minutes of use. This is normal as it seats into pulleys.

Should You Buy It

If you own a Cub Cadet or MTD zero-turn with a 46" fabricated deck and need a durable, OEM-compatible belt at a mid-range price, this is a solid choice. The Kevlar cord adds longevity for heavy or frequent mowing, but if you prefer easier installation or have a tight budget, a standard rubber belt may suffice. Avoid if your belt measures 126" or you have a stamped (not fabricated) deck.