I had my EGR replaced a few years ago.
Symptoms were loss of power - often gradual when you were on the move and sometimes when pulling out of junctions, this made life fun.
The AA guy who came out to check mine (Fiat cover) told me when the fault occurred to take it out of gear and floor the throttle, this temporarily clears it and is also a good indicator that the problem is the egr.
Since replacement about three years ago it's been fine (probably just cursed myself!)