2020 Nissan Pathfinder Engine

My 202 pathfinder started misfiring with sever knocking, Nissan said there is metal saving in my oil which is caused because of the long block engine failure and timing chain loosening. I had my oil changes done every 4K, and I also had the fluids flushed twice in 5 years because of excessive build up. How does this happen.

Engine misfiring on left side due to faulty timing chains. Car would not start at times, and engine light flashing. Safety was at risk due to engine being unreliable, misfiring, and we were advised it could possibly stall/cut-out while driving. Problem confirmed by independent service center. Dealer service center would not diagnose without taking engine apart at our expense, they recommended replacing the whole engine, and the car is only 3 years own. There is a know issue with the timing chains on this model of vehicle, yet they did nothing to resolve the problem.

I drove from Pine Bluff, AR to Memphis, TENN in pouring rain. There were many tractor trailers on the highway throwing water back on my vehicle. When I got into Memphis, my vehicle shut down and would not re-start for several hours. I believe this to be a safety issue because if I had driven a little farther and it suddenly shut down in traffic, this would have caused a terrible accident.

Engine failure while driving. Abnormal engine oil consumption. Oil level dropped without warning and without any warning lights from the vehicle. The vehicle oil level as checked 1 day prior to failure.

TL* THE CONTACT OWNS A 2020 NISSAN PATHFINDER. THE CONTACT STATED THAT THE CHECK ENGINE WARNING LIGHT ILLUMINATED INTERMITTENTLY. THE CONTACT TOOK THE VEHICLE TO COURTESY NISSAN (1777 N CENTRAL EXPY, RICHARDSON, TX 75080, (972) 231-2600) AND WAS INFORMED THAT THE OXYGEN SENSOR FAILED AND NEEDED TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 19,700.*DT

WHEN DRIVING OR IDLING YOU GET A SMELL OF ANTIFREEZE INSIDE THE DRIVERS COMPARTMENT. DEALER SAID THE ONLY WAY TO FIX WAS TO GET THE HEATING AND COOLING SYSTEM ON RECIRCULATING AND NOT FRESH AIR. THIS IS CONSTANT PROBLEM NO MATTER THE TWHAT THE TEMP AT URGE ISOUTSIDE.