What are the fuses strips called in the fuse box under the hood on a 03 vw jetta?

Ironically, they are called Strip Fuses. They are not carried by your big name auto parts stores like Auto Zone, Advance, or O' Reilly's. You need to get them from a VW dealership ( if they will sell them to you ) or your best bet will be to find a local foreign car part store to get them, which may be hard to find. Luckily most of these shops specialize European cars and VW's specifically because of VW's complex electrical systems and specialty parts. I just ordered one of these strip fuses for my Jetta today at a local foreign car shop, it ran me $4.50. I over answered the question but hopefully it saves you time.