Thank you Kevin. EZVacuum support states it is not (I sent them an e-mail about this from my PC and not their web site).

I then received an e-Mail from EZVacuum that says you are a customer. I assume you have personal knowledge of this and the 203-9901 can be used instead of the 603-9901 in the owners manual.

There is a bit of a difference of selling the parts and using the parts. I was hoping there was a master book of superseded part #s or parts from a different company that would work that EZVacuum had access to. Sort of like spark plugs, oil filters or windshield wipers.

I'll give it a shot.

Yes, it's same part number for this belt.