06H121026AB - Is an original water pump for the CCTA and CBFA engine. That I have seen from my car and others that have had their's replaced already.
06J121026AN - Water pump that you are inquiring about.
06H121026BA - Newest one that I know of, and the one that was put into mine about 1k miles ago as pertaining to the CCTA and CBFA motors.
I don't see why you CAW motor couldn't utilize the "newest" pump revision.
Thanks for your answer. In fact my water pump was replaced a month ago with 06H121026BA, but now the high pitch sound is back. RitterTX (you can find his videos and comments on youtube) told me he had this very same problem finally fixed by his dealer with 06J121026AN (2000 miles since install and there is no noise or failure), stating that this is the newest rev. Here's the link (check out the comments):
This whole wp issue is just confusing, FRUSTRATING.
It's no break in...
I'm on my 4th pump in 2 months bc of the high pitch whine. It's coming from a faulty bearing within the pump.
I was told vwoa should have a revised pump from a different manufacturer in about a month.
I'm gonna call today and see if there is any progress.
They are ordering new pump but the service manager told me I could pick up my car as the sound I'm hearing is not from the bearing but from the seal. He said he will call me when the new pump comes and they will install it the same day. He told me that it is the same part number but it could be superseeded to a newer pump before it arrives. I asked him if is the same part number who's to say that the sound won't come back his reply was "it may but I couldn't tell you for sure"
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I just got a brand new '12 CC 2.0T and am having the same problem.
At this point, don't even know if I should mention it to the dealer since there is no guaranteed fix .
More info here: