£800 seems to be the going rate for a sachs kit fitted.
I had mine remapped and its never once missed a beat, not even a fault code. I just made sure it mechanically sound all round before mapping. In fact, in the near past year the only time its been off the road was when a bump smashed a hole in the sump. Its been the most reliable car I have owned. I sold my impreza when my son was born and went for the 130 for performance, reliablity, comfort, nice looks and mpg
Just read on here what to look out for when you buy or see if somebody on here near you can cast a quick eye over one you veiw maybe??