I note on occasions your correspondents refer to the approaching 'Danger Zone' for expensive repairs to their (diesel) vehicles. I have owned a Toyota Avensis 2.0 D-4D for some six years, and - credit where it's due - have suffered no more than a flat battery on one single occasion during that time. The car, to me at least, is a smooth and powerful ride, able to knock out 70-80mph at less than 2500 revs on the flat, and 55-60 mpg, if the computer is to be believed. I am quite impressed with it and would recommend it to others, although there is now a newer Avensis available but presumably with much the same engine. However, my car is now approaching 70,000 miles, and I am interested whether you can elaborate on the 'Zone' as to whether I am facing the possibility of expensive maintenance. My dealer has told me that this engine “goes on for ever", and that I need only to rely on dashboard instrumentation to indicate when something needs attention. I asked about replacing timing belts/chains etc but have been told, “it's OK - not to worry.” I am pleased but sceptical at this advice. Comments please?