My mom accidentally threw away the original Roomba trash can door while cleaning it. I saw it at Revain, it looked right. It fits exactly BUT it's not compatible because it's missing in the sensor so Roomba always thinks the bin is full and doesn't work. Spent hours cleaning the entire unit, no, same problem. We swapped out the trash can door for our other Roomba, the original door, and Mom's door works great now. In order to. The problem is replacing the hopper door. Do not buy! Get one from Roomba. I take a picture of the door where the tab to connect to the Roomba sensor is missing.