Quick answer

Replacing the Bissell BigGreen 86T3 drive belt is a DIY job of about 10 minutes. Compatible drive belts currently start at $5.99 (genuine Bissell OEM from $6.59). Replace it Every 12 months under normal use. Full step-by-step below.

The 86T3 belt is a flat drive belt on the brush-roll assembly under the machine. Because the Big Green runs wet and works hard, the belt is a genuine wear part — replace it when the brushes turn weakly, stop, or you smell hot rubber during a clean.

Compatible Drive Belt for the Bissell BigGreen 86T3

Prices pulled from Amazon and verified September 2026. “OEM” is a genuine Bissell part; the rest are tested aftermarket options.

PartTypePriceRating
BISSELL Style 7/9/10/12/16 Replacement Vacuum Belts, New Genuine OEM Replacement Belts, 2 Count, Model 32074 OEM $6.59 4.65★ (29,277) Buy on Amazon
KEEPOW Style 7/9/10 P/N 3031120 Replacement Belt for Bissell Vacuum, 4 Pack Aftermarket $8.99
$2.25/ea
4.65★ (13,275) Buy on Amazon
Replacement Vacuum Belts for Bissell 2910, 2910W,1986, 2987, 29878, 29879, 2806, 28062, 28068, P2283,22839,22837 PowerForce/TurboClean PowerBrush Pet Carpet Cleaner,Parts# 1606428 (2Pack) Aftermarket $5.99
$3.00/ea
4.45★ (1,086) Buy on Amazon
Belts 6960W Replacement for Bissell Proheat Vacuum Model 1694W 1697 1698 1699 1799 1846 7901 7920 7950 8806 8905 and 8910 Series, Replace Parts 0150621 and 2150628 Aftermarket $6.99 4.55★ (687) Buy on Amazon

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About the Bissell BigGreen 86T3

The Bissell Big Green 86T3 is a heavy-duty upright deep carpet cleaner. Its rotating brush roll is turned by a drive belt; when the belt stretches or snaps, the brushes stop spinning and the machine washes without agitating, leaving carpets cleaner-marked but not truly clean.

Step-by-Step: Replacing the Bissell BigGreen 86T3 Drive Belt

1
Power off, unplug, empty tanks
Switch off and unplug the 86T3 and empty both water tanks before laying it over.
2
Access the brush roll
Turn the machine over and remove the brush-roll cover/window on the underside to expose the roller and belt.
3
Lift the brush roll and clear hair
Lift the roller out and strip all wound hair and fibre from both ends and the bearing caps.
4
Remove the old belt
Slip the stretched or broken belt off the motor shaft and the brush-roll pulley.
5
Fit the new belt
Loop the new belt onto the motor shaft first, then over the brush-roll pulley so it sits square.
6
Reassemble and test
Refit the roller and cover, plug in and run briefly to confirm the brushes spin strongly.

⚠ Common mistakes on the BigGreen 86T3

The common 86T3 mistake is fitting a new belt without clearing hair and carpet fibre wound around the brush-roll ends — the roller binds and burns the fresh belt out fast. Also make sure the machine is unplugged and empty of solution before turning it over.

✓ OEM vs aftermarket for the BigGreen 86T3

Match the Big Green 86T3 belt by Bissell part/style number; genuine and quality aftermarket belts both work, but the wrong length slips on a wet-running machine. A multipack is sensible since this belt sees hard use.

🔁 How often to replace

The Bissell BigGreen 86T3 drive belt should be replaced Every 12 months under normal use — sooner with pets or daily heavy use. Signs it's due: Brush roll not spinning.

How we made this page: the steps are written for the Bissell BigGreen 86T3 specifically; the compatible-part list is pulled from our parts database and price-checked against Amazon. Last verified September 2026.