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Renault Megane 2015: Warranty on DPF unit block

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My 2015 Renault Megane has a warranty that expires in late May 2019. I have a diesel engine and the DPF unit blocked in November last year and the fixing cost is around $700. I went to the dealer and Renault Australia for a refund, but both said it was outside of warranty because it was caused by driving style (not long enough and not fast enough to trigger the auto regeneration process). But my point is, as a new diesel user, I was not informed in any verbal/written form by either dealer at: 1) purchasing stage; 2) new car collection stage; or 3) by Renault Australia through their user manual, about the 'special' driving style required to maintain healthy diesel engine. I am now communicating with both of them and also contacting consumer business service in SA. Do I have a fair ground to win the refund of that cost?

I understand your frustration; I also agree that diesel buyers should be made aware of the possible consequences resulting from the way they will use the car. Blocking of the DPF because of being used on short, low speed trips is quite common across most brands, so it could be argued that you should have done you homework and known that. As to whether you have good grounds for a refund I can’t say, but I suspect you could request a refund, or part refund, as a gesture of good will from Renault.

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