My 110 2.0 tdi is now 10 years old and still running the original exhaust system, never had any dpf issues etc. Now I'm beginning to wonder how much longer before I need to look at replacements.

Has anyone had to do this recently? just trying to get an idea of costs and if 10yrs on an oem system is nothing unusual. I'd appreciate your thoughts on this matter

16 years on one of mine. No problems.
(Hope I won't regret saying that?)

1.2 tsi so petrol rather than diesel but mine is still going strong. I seem to remember reading on this forum years ago the exhaust is stainless steel(?) but I wouldn't swear to it.

I jet washed under the car this week after the winter and was surprised how new looking most of the exhaust was at 9 years old, so it probably is.