S40 T4 guide, things to look out for?

[issey23]

I'm thinking about a S40 T4 as i've been offered one quite cheap and kind of like the idea of an S40 with a bit of power

The one in question is a 98' T4 with just over 100k on the clock

What do I need to look for?
Any common problems on the T4 that you dont get with the others (i already own a S40) but been told it has a FSH

Thanks