Our Bosch dishwasher is about 12 years old and this is the first issue we have had. Took the old seal off and put the new one on and it took a couple of minutes but it still leaked. I then took the new seal off and scrubbed the bottom inside with Barkeeps Friend to remove the hard water deposits, reinstalled and no longer have a leak. Who knows maybe I could have just cleaned it and used the original seal which seemed to be in decent shape but needed a good cleaning. Easier to replace.