yes they can leak from there, there are 2 o-rings inside that cup that are around the bottom of the plastic cylinder. to take it apart, you have to make certain it is empty, meaning no air, take the solenoid out to be sure, then use an impact gun to take the top nut off, remove the washers and then you can tap the part where you have the circled part, the bottom of the plastic under the air bag, tap all around with a rubber mallet working around the whole thing and you will see it start to come out, then you simply lift it off and you will see the o-rings i speak of, they come apart very easy.