Engine question on Honda Crosstour 2010

What is your question?

Honda Dealer told me a few years ago that my Crosstour was misfiring because there was a known issue with the engine. They suggested having the whole engine redone (whatever that means). Are you familiar with this? Since they redid the engine my car makes a tingling sound every time is downshifting gears. I took the car several times in a course of 2 years to the same dealer but they were never able to hear the noise.

What makes this problem better or worse?

It gets worse when car is downshifting gears.

How long has your 2010 Honda Accord Crosstour had this problem?

over 5 years