It is difficult to tell if it is an oem part. However, I would be shocked if it was orginal. They usually last 5-7 years depending on use and fluid replacement regime.
m

oops meant to reply not new post see is my water pump original or has it been replaced?

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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)