Seems to be a very common issue, I had it not long ago. Rather than shelling out £100+ for one of these repair jobs I just searched through breakers and got a second hand one for £35 works absolutely fine just plug and play. The only issue is obviously the milage, it flashes continuously because it knows that it is wrong, my car only has about 47k but the dash is about to hit 100k, I'm not bothered though as I will be this car's last owner. I think if you get it proxy aligned (either at a garage or with the MultiECU thing) it will stop, though I'm not going to pay to have this done