Mine on 70k ish now. At 50k plus developed a egr cooler leak into exhaust. The coolant disappears without trace, and holds well on pressure test. When hot, the egr cooler opens up a leak to the exhaust side, eventually leaking into the exhaust. The glycol damaged the dpf, and after numerous test and code re appearing, I went to Germany and bought a new dpf from vw and fitted it myself. Took 1hr to take of, and 1/2 to re fit.
I did fix the egr cooler leak before the dpf change, by changing the cooler with a used second hand for 240. A new cooler is 500 euros. In UK didn’t even tried as none in stock.
Hope this helps.
Also I forgot, the dpf pressure sensor, had no clips on the rubber lines, somebody forgot? I fitted two stainless to be sure no faulty pressure readings will trigger a fault in the future.