The Dishrack Roller Assembly is an OEM component specifically designed for Frigidaire dishwashers. It consists of precision ball bearing rollers that allow smooth extension and retraction of the lower dishrack. Symptoms of a bad roller assembly include: The lower rack getting stuck and not fully extending or retracting  Scratching or grinding noises coming from the roller area Difficulty accessing the lower rack due to poor movement Causes can be general wear and tear over time, an incident that damaged the rollers, or a malfunction of the guiding mechanisms. This OEM Frigidaire replacement part is also compatible with some Electrolux, Gibson, and Kenmore models.Part Number 154522902 (AP3778094) replaces 154522901, 1063912, 5304407064, AH976040, EA976040, PS976040.