Recently I took my 2010 Altima in to have an engine noise checked out. I have heard this knocking/tapping with acceleration since having about 400 miles on my car, and this visit was the 3rd time I had asked to have it checked out. I now have 5500 miles on my car, and the noise is louder and lasts longer the more I drive it. My issue is that neither the service coordinator nor the tech could hear the noise. I could hear it--they could not. My fear is that it is something that is damaging my engine and reducing the usable life expectancy. Everyone involved was very polite and helpful, but my experience has been one of frustration. I have and will continue to recommend Nissan products to family and friends, but I do share with them the frustration I am experiencing in my efforts to solve the issue of the knocking/tapping.
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