The Rear O-Ring is an OEM part for Frigidaire dishwashers. This small but crucial component ensures a watertight seal within the dishwasher's internal systems, preventing leaks by sealing connections between various parts, such as the pump or valve assemblies. The front O-ring is part number AP2109102 Causes of a bad rear O-ring can include regular wear and tear, drying out or cracking due to age, and damage from chemical exposure or improper installation. A compromised O-ring can lead to water leaks and reduced efficiency of the dishwasher. Symptoms of a bad rear O-ring include: Water leaking from the dishwasher Puddles forming underneath the appliance Reduced washing performance due to water pressure loss Noticeable wear, cracks, or deformation on the O-ring This OEM replacement is also compatible with Electrolux, Gibson, Kelvinator, and Kenmore models.Part Number 154246901 (AP2109101) replaces 419206, AH420466, EA420466, PS420466.