Isn't EGR valve malfunction covered under warranty?

My Swift comes with a 2-year warranty and I have additionally purchased extended warranty for 2 more years. Since my car has not even completed 2 years, I was surprised when M/s PEBCO, Jamshedpur (Maruti authorized service station) stated that my EGR valve problem would not be covered under warranty and would be carried out on chargeable basis.

I reasoned with PEBCO that EGR valve cleaning is scheduled (as per Swift’s maintenance schedule) only at 30,000 km and if it has got clogged prematurely at 19,000 km, there must be some design / manufacturing defect and so its rectification should be covered under warranty.

PEBCO officials told me (as a justification for not covering the problem under warranty) that adulteration of diesel is common in India and this leads to excessive carbon formation which clogs up the EGR valve prematurely. I informed PEBCO that I always bought diesel from a reputed petrol pump in Jamshedpur and challenged them to draw a fuel sample from my car’s tank and prove that it was adulterated.

It is relevant to mention here that I had already discussed this issue with the petrol pump owner (who happens to be a qualified engineer) and he told me that some car service stations routinely raise the bogey of adulterated fuel to justify several problems in their respective cars and escape warranty liability. This petrol pump owner assured me that I could ask the diesel manufacturer (Indian Oil) for chemical analysis of the fuel sold in his petrol pump and defied any car service centre prove that his fuel was adulterated.

Despite all my reasoning, PEBCO refused to take a diesel sample from my car and stubbornly stuck to their decision not to cover my EGR valve problem under warranty.

Subsequently, I took up the matter with Maruti’s Regional Office at Ranchi. They agreed with my reasoning and directed PEBCO, Jamshedpur to rectify the defect in my car free of cost (under warranty). The matter was thus amicably resolved.