Time after time I read you comments about problems with DPFs and todays' copy of the Telegraph was no exception. I personally had my first problem after approximately one year with my new Nissan X-Trail and the supplier duly cured the problem (because I could not) under warranty, although I suspect it cost me quite a few gallons of diesel. I was told at the time that new software had been installed which changes the operating conditions of the engine/DPF and it should not happen again. So far, 6 months later, it has not. My car does what I imagine thousands of others do: around 12,000 miles a year made up of journeys to say Yorkshire or Devon, perhaps 2/3 trips to France with much Autoroute travel and round trips of say 3,000 miles. In between there will be plenty of short journey stuff. Surely "normal" usage. Now I am quite sure that Nissan does not say in its sales brochures that "this car is not suitable for small journeys". Therefore it seems to me that the problem is being swept under the carpet and that cars fitted with DPFs should be recalled and fitted with equipment fit for purpose, or the DPF should be removed, or, at the very least, the manufacturer should give a guarantee for the lifetime of the car to regenerate the DPF in the case of a problem.