just for clarification you are saying that the parts are improved
versions and physically different, not that the letter after the part
number does not indicate an improved or redesigned version right?

so on these three different filler tubes are all three still available
from the dealer?  if only one version is stocked by vw does etka tell you
all the other additional parts you need to make it work in an earlier van?

any ideas on the differences in the ecu numbers that the original poster
posted?

jonathan

On Mon, 9 Oct 2006, Mark Drillock wrote:

> There are lots of examples where this is not the case. VW parts with
> only a different letter suffix may not be at all compatible or
> interchangeable, even if only one letter off.
>
> A Vanagon gas tank seal for filler tube comes to mind. There are 3
> listed for 2wd.
>
> 251 201 139
> 251 201 139A
> 251 201 139B
>
> Good luck replacing any of the 3 with either of the other 2.
>
> Mark
>
> Jonathan Farrugia wrote:
>> when vw improves or modifies the original part they add a letter to the
>> end starting with A and working up for every revision.  all of the parts
>> should work reasonably the same.
>>
>> jonathan
>>
>> On Sun, 8 Oct 2006, Jeff Oxroad wrote:
>>
>>> Here's one for you in the advanced class.
>>>
>>> Half price at the Pick and Pull today in Sunland,CA (near LA). Only one
>>> Vanagon passenger Van. I grabbed an ECU off the 84. The part number on
>>> it is
>>> 025-906-021C.
>>>
>>> ETKA list the ECU for my 83.5 as 025-906-021.
>>>
>>> .............
>
>
>