Absolutely This. ^^^^^^^^It is most likely (virtually certain in my mind) that the build up of "crap" in the inlet manifold, (which causes the flaps to bind, which in turn breaks the linkage and possibly the actuator) comes from the EGR circuit. Using 99 octane, Shell V Power (other brands are available), ensuring fuel burn is as complete as possible by keeping the spark plugs in good nick, making sure engine runs at correct temperature, and using only high quality oil, changed annually is my plan to minimise EGR "crap"
At 50,000 mls, I'm optimistic that my Fizzy will be good for a while yet.
My car has been extremely well maintained throughout its life, and when i got back my old lower inlet manifold @ 88k (from memory) was barely dirty and nothing of what many have talked about in the past. Certainly no build up of heavy deposits and we had full movement of the flaps. In all honesty i don't think it needed changing but an injector certainly did, hence the reason why we were in there. For very well maintained cars the most likely faults are misfire counts because of iffy injectors, it's one of those things, and imo the worst culprit sensors by a mile. Oh and dodgy mechanics who don't know what they're doing.