I heard a light knocking in motor of the 2017 Tacoma the day after I bought it. I asked someone else to listen and they didn't hear it so I thought it was just me as this is the first Toyota I ever had. I found name of orginal owner in glove box so I contacted him just to ask him about truck. The first thing he said is the only reason he got rid of it was because of a knocking in motor. He said it was there from day one as a brand new truck. He brought it into Toyota several times and they told him it was something with the 2016 and 17 Tacomas and it was nothing bad or that would affect the engine. Has anyone heard of this or had this problem?