The Upper Spray Arm is an OEM part for LG dishwashers. This part is located at the top of the dishwasher tub, responsible for spraying water and detergent onto the upper rack of dishes during the wash cycle. Causes of a bad Upper Spray Arm can include mineral buildup or debris clogging the spray holes, physical damage from impact or foreign objects, or wear and tear over time. Symptoms of a faulty Upper Spray Arm include: Incomplete or ineffective washing of dishes on the upper rack Water not spraying evenly or not spraying at all from the upper arm Clogged or blocked spray holes Loud noises or grinding sounds during the wash cycle This OEM LG part is also compatible with some Kenmore models.Part Number 5249DD2001A (AP4442765) replaces 1268148, AH3527665, EA3527665, PS3527665.