Temp gauge

[Michmash/eddie]

Evening all,

I apologise if the questions have been asked before.

I have just bought my 2004 passat tai, the temperature gauge does not work, we'll not very often at all. The heaters get nice and hot, and it does not overheat etc. am I correct in thinking that the temp sensor will be at fault? And if so where abouts on the block is it, and a rough price for a new one.

Thanks again in advance