Motor and moving part issues in robot vacuums usually involve drive wheels, brush assemblies, or the suction motor not operating smoothly or at all. In most repairs, the failure is caused by hair buildup, worn bearings, stripped gears, or overheating from restricted airflow. A common pattern we see is gradual noise increase or reduced movement before complete failure. These repairs range from simple cleaning to moderate mechanical work and often have high success rates. Diagnose binding and wear before replacing assemblies.