The filter catches foreign objects such as coins, dirt, and threads to protect the pump from clogging. Bosch Exclusiv 500, 900, WFB 1005, 1207, 1602, 1605, 1614, 1640, 1670, 1805, 2002, 2005, 2405, 3200, 3240, 4001, 4040, 4800.
eBay