The Detergent Cup Latch W Spring is an OEM part for Bosch dishwashers. This latch securely closes the detergent dispenser cup, containing detergent during the wash cycle. Causes of a bad latch can include wear and fatigue of the latching spring over many uses. Symptoms of a bad detergent cup latch include: The cup popping open unexpectedly during a wash Difficulty fully closing and hearing the "click" of the latch Detergent leakage resulting in reduced cleaning This genuine OEM Bosch part is also compatible with Thermador, Gaggenau and select Kenmore models.Part Number 00166630 (AP2802332) replaces 166630, 935391, AH3439219, EA3439219, PS3439219, PS8697162.