The Roller Assembly is an OEM part for Frigidaire dishwashers. This part ensures that the dishwasher racks glide smoothly in and out, providing easy access to dishes and utensils during loading and unloading.   Causes of a bad roller assembly can include regular wear and tear from frequent use, damage from overloading the racks, or exposure to harsh dishwasher detergents and high temperatures. Symptoms of a bad roller assembly include: Difficulty sliding the racks in and out The rack falling off the track Unusual noises when moving the racks Visible wear, cracks, or missing rollers This OEM Frigidaire part is also compatible with Electrolux, Gibson, Kelvinator and some Kenmore models.Part Number 5304506916 (AP6038478) replaces 154767502, 154581103, 154579402, 154579403, 154581102, 154767501, 4456420, 5304407065, 5304456938, PS11770563.