LG Dishwasher Circulation Pump Motor Parts — Models & Compatibility

If your LG dishwasher sounds like it's grinding gravel or your dishes come out still dirty after a full cycle, the circulation pump motor is likely failing. This 4681ED1004B pump is the direct replacement for dozens of LG and Kenmore Elite dishwasher models from the LDF, LDS, and LD series. It's also sold under part numbers 4681ED1004A, 4681ED1004D, AP5325099, and PS3579321.

Is This the Right Part for Your Model?

Check your dishwasher's model number — it's typically on a sticker inside the door frame along the top or side edge. Match it against the compatibility list below. All LDF6810, LDF6920, LDF7810, LDF7811, LDS4821, LDS5040, and LDS5811 series use this exact pump motor. The model/serial tag will show something like "LDF6810ST" or "LDS5811BB" — if it matches the prefix, you're good.

About This Replacement Part

The circulation pump motor drives water through the spray arms during wash and rinse cycles. When it fails, you'll hear loud grinding or humming noises during operation, or the dishwasher will run quietly but leave dishes dirty because water isn't circulating properly. This is one of the most common failure points in LG dishwashers after 5-7 years of use. The 4681ED1004B is a direct OEM-equivalent replacement that restores full water pressure and proper spray arm rotation. It includes the motor assembly and mounting bracket — you'll reuse your existing pump housing and impeller from the old unit.

Compatible LG & Kenmore Dishwasher Models

This circulation pump motor fits the following models. If you don't see your exact model listed, check the full compatibility data on the product page or contact us with your model number.

• LDF6810BB, LDF6810ST, LDF6810WW
• LDF6920BB, LDF6920ST, LDF6920WW
• LDF7810BB, LDF7810ST, LDF7810WW
• LDF7811BB, LDF7811ST, LDF7811WW
• LDS4821ST, LDS5040ST, LDS5811ST
• LD6090BB, LD6090TB, LD6090WB
• LD6100BB, LD6100TB, LD6105BB
• LD6300BB, LD6310TB

Why This Part Fails

Hard water deposits, food particles, and bearing wear cause the motor to work harder over time. Eventually the motor windings overheat or the bearings seize, resulting in noisy operation or complete failure. If your dishwasher is making grinding sounds or not cleaning properly, this pump motor is almost always the culprit. Replacing it now prevents damage to the control board from electrical overload.