If you are thinking of doing the repair yourself i would suggest you fit a full blanking plate (£5 ebay) which will determine if the fault is with the egr before spending £60 on a new egr.
If it turns out to be the egr thats at fault you can then put a 8mm hole in it and have a partial blank with your new valve.
See the posts here re egr blanking
If it turns out to be the egr thats at fault you can then put a 8mm hole in it and have a partial blank with your new valve.
See the posts here re egr blanking