I have a 2009 mazda3 2.0 diesel; I have just being advised that this car has a DPF in the exhaust , and that I MUST have the computer reset at every oil change(only at Mazda dealers mind you); also if the light flashes I must take it again to a dealer; I mean ;what the hell! ; So for the life of the car its must be serviced every 10K at a dealer;*surely this is not correct.* I bought this car to do big K's economically;*

now the good bit!

The light is flashing "DPF"*so away to dealer; no I am told this DPF has "woofed its cookies"*and that will be $8000 please. yes you read it correctly, and Mazda will not do a warranty as the ECU was not reset at each oil change (that’s because I do my own services, have for 40 years)*and I did have the majors done at the dealer, at no time was I told that if this was not done I would loose warranty and amount of mediation will make them change their mind. So I put an after market on in this cost $3000.*Car is now someone else’s problem.*

so word of warning here* DO NOT BUY a car that has a single part worth*30% of the new car price...and must repeat must go to a Mazda dealer for the life of the car, else warranty is gone; and if not in warranty and the DPF dies.....I hope you have deep pockets.* i.e. save a few hundred on fuel; spend thousands and thousands on service and parts.

PS; I have owned 6 diesels in my time, and a total of 14 cars all from new; and all services by me; except for majors.* I have had warranty claims twice before with no issues...

My is now with consumer affairs and in the hands of lawyers.