How often should a dryer drum belt be replaced?

A dryer drum belt typically lasts for many years under normal use. Replacement is usually only necessary when the old belt breaks, stretches, or shows signs of severe wear, leading to the drum not spinning or making excessive noise. Regular preventative replacement is generally not required unless specified by the manufacturer.

Can I use my dryer if the drum belt is broken?

No, you should not use your dryer if the drum belt is broken. Without the belt, the drum will not spin, and clothes will not tumble or dry properly. Continued operation could also potentially damage other dryer components, such as the motor, due to unbalanced load or overheating.

What causes a dryer drum belt to break?

Common causes for a dryer drum belt to break include normal wear and tear over time, overloading the dryer which puts excessive stress on the belt, a seized idler pulley or motor pulley causing friction, or foreign objects getting caught in the drum mechanism and damaging the belt.

Bosch Dryer Drum Belt Replacement Guide

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GYUPTRK Dryer Drum Drive Belt Replace 491679 AP3679616 Fit for Bosch Nexxt 300/500 Series Gas/Electric Dryer Belt WTMC3321US WTMC3300US WTMC

Fitment: Fit for Bosch gas/electric dryer WTMC3300US/01 WTMC3321US/03 WTMC3321US/06 WTMC4500UC/01 WTMC552CUC WTMC5321US/05 WTMC5521UC/06 WTMC5500VC/01 MTMC5500VC/01 WTMC6300US/01 WTMC632SUS/02 WTMC652SUC/02 WTVC6530UC...
Replacement Part Number: Dryer drum drive belt replace 491678 00491678 491679 00491679 9000504172 1107394 AP3679616 EAP8722577 PS8722577
Premium Material: Drive belt is made of high quality materials, providing exceptional durability and reliability. Ensures drive belt maintain integrity even under prolonged use, resisting wear and tear to provide cons...
Location and Connection: The belt is usually located at the rear of the dryer, connecting the motor's shaft and the drum's shaft. It is tightly secured on the respective pulleys to ensure efficient power transmission.
Maintenance and Replacement: Over time, due to usage and wear, the dryer belt may become loose, damaged, or worn out. In such cases, regular inspection and maintenance of the belt are necessary, and replacement should...

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What the REPLACE491678 does

The dryer drum belt is a long, thin rubber belt that wraps around the dryer drum and the motor pulley. It transfers rotational energy from the motor to spin the dryer drum, tumbling clothes during the drying cycle.

Symptoms when this part fails

Dryer runs but drum does not spin
Loud thumping or squealing noise from dryer
Clothes remain wet after a full cycle
Burning smell from the dryer

Compatibility

Fits the Bosch family. Specifically:

Any unit originally equipped with OEM part number(s): 491679, 491678.
Check the model/rating plate inside your appliance and compare it against the fitment table on the product listing before ordering — this guide does not list specific compatible models because Amazon does not provide verified fitment data through this pipeline.

Also replaces: 491679, 491678

Tools you'll need

Phillips screwdriver
Flat-head screwdriver
Nut driver
Pliers

Difficulty: Moderate · Time: 1-2 hours

How to install the REPLACE491678, step by step

Unplug the dryer from the wall outlet.
Remove the dryer's top and front panels.
Carefully lift and remove the dryer drum from the cabinet.
Remove the old belt from the motor and idler pulleys.
Install the new belt around the drum, motor, and idler pulleys.
Reinstall the dryer drum and secure all panels.
Plug in the dryer and test for proper drum rotation.

Related troubleshooting

If swapping this part doesn't fix the issue, check these next:

Dryer Not Tumbling But Heating? Fix the Drum or Belt