I'm thinking of going down the remap route too in the near future when funds allow and my 2003 1.9 TDi 130 Quattro is currently on 101,000 miles.
Like others have said, I am not worried at all about the miles on the clock as everything seems to be working fine and there are no signs of obvious wear in the engine (touches wood
)
What I will do though is get the turbo and inlet manifold cleaned and then get an EGR delete kit fitted before getting the remap done. The last thing I want is for the engine to soot up with the additional load put through it.
I'd do the same thing too if I was looking to fit a tuning box.
DTUK are a very good outfit and their website is well worth a look. I've used their products before and rate them very highly. Easy to purchase and very easy to install. The additional performance is great fun and there is little effect on fuel economy (don't believe the hype that they increase economy - its bull!), and of course once you're done with it you can flog it on eBay and get some money back.
The only downsides are that I have read that the tuning boxes tend to give a very large slug of torque low down in the rev range all in one go which can put the mechanicals under enormous strain. Remaps tend to produce a much smoother torque curve and more progressive power delivery which I would much prefer.
Anyway, I was surprised how punchy my 130 was as standard when I first got it and so I'm more than keen to see what it would be like with another 40 horses and roughly 55lb/ft more torque
- deffo do the EGR and turbo clean first though
J