I did it; was easy if you follow the trick I cited on an earlier post to this thread. You will need to be sure that you do not permanently deform the thin sheet metal fins when you remove the old one. You will need them in their original condition to hold the new one in place.
You can gently pry each fin off of the side of the dispenser with a very small flat screw driver blade. You barely need to bend each one to disengage it, but when you remove your screwdriver blade, the sharp edge of the fin will re-engage the dispenser unless you slip something in the gap before you remove the screwdriver blade. The trick is to insert a tiny brad or thin strip of metal (like a feeler guage) between each fin and the dispenser to keep it from re-engaging. I used small diameter ~1" long brads. Put 1 or 2 brads at each fin, one fin at a time. Once all of the brads are in place the dispenser just pushes out of the door into the inside of the washer.
The new one pushes back into the hole and engages the fins. The fins point into the hole, so the dispenser slides right in. The fins act like fishing hook barbs to prevent it from coming back out. No brads are needed for the install. Push it in firmly to make sure the gasket on the back of the new dispenser seals against the edge of the inner door hole. The uninstall / reinstall took only a couple of minutes after opening up the door. I hope this helps. It really was pretty easy.

Pat

Crosney
Check out one of the earlier replies, and there is a picture attached of the vented and unvented dispensers. They are not interchangeable ( at least , not if you want it to work right, although it will probably fit). There is confusion about whether the models came with vented/unvented, and it is quite clear that some models defy the wisdom of what is supposed to be installed. Mine was supposed to be unvented, and it was not. I think others have had the same experience. Just look at the pictures, they are very clear, and you will see quickly which one is right for you.

AR

Hello,

I realize this is a very old thread, but I am having the same issue with the soap dispenser. Bosch tells me I need Part number: 263088

Thanks, Gene. Interesting because the match tool on the site says it doesn't work with my model. I still wonder what is the difference between 490467 and 488964?