One problem related to loud engine noise has been reported for the 2019 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2019 Toyota Highlander based on all problems reported for the 2019 Highlander.
With 300miles on Highlander started to experience issues in driving and drop in performance. Performance was very significant especially noticeable in mpg. At scenarios when the car would not drive up the hill but rev to max and start rolling back with �clicking� noise. Toyota was send to service many times after to multiple Toyota dealerships but they did not have any diagnosis. At 15k miles on the car driving on highway (70mph) the Highlander lost power and started loud noise. When pulled over found oil smell and smoke from engine. During examination found 3 cylinder went loose. During that time one of them came off the side and hit the transmission. Almost a full month the Highlander was rebuilt but no final word what had happened by Toyota corp. The car is about 17k miles and started to act the same way. As a family we are afraid to drive the car especially my pregnant wife with children. I am afraid this may happen again and can lock up all wheels and can result in massive accident. Toyota is not taking this as serious and seems to me they do not care. As of right now the Highlander has problems with alignment, lane assist, and lack of power. Please see pictures.