The 4 most common part(s) or condition(s) which cause the symptom Dishwasher leaking from motor area are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 1057453
If water is leaking from the pump by the motor shaft, the impeller and seal kit will need to be replaced. If the impeller and seal kit are are not available separately or you don't want to take the pump apart, you may want to replace the pump and motor assembly.
RepairClinic Item # 1469683
If the dishwasher is leaking water from the motor area, the seal kit might need to be replaced. The seal kit normally consists of a spin seal which is pressed into the pump housing and a wash impeller that mates with the spin seal to create a water-tight connection. You may need to remove the pump assembly from the dishwasher to replace the seal depending on the model.
RepairClinic Item # 1875706
If the dishwasher is leaking water from the motor area, the entire pump and motor assembly might need to be replaced. If the seal kit is sold separately, consider replacing that first. If the motor shaft is rusted too much and the new impeller won't go on the shaft the pump and motor assembly might need to be replaced.
RepairClinic Item # 1180729
If the dishwasher has a leak in the motor area, the sump seal might be defective. Most dishwasher pumps have a large bowl, or sump, which collects the water that goes into the pump. The sump mounts into the bottom of the dishwasher and there is a rubber seal around the perimeter of the sump which provides the seal to the dishwasher main tub. If that sump seal has worn out a leak can occur. Some dishwashers have a lock ring that holds the sump tight to the bottom of the tub. If the lock ring is cracked or damaged it will need to be replaced.