NHTSA Complaint #11512456 — 2015 NISSAN SENTRA

My 2015 Nissan Sentra has received routine maintenance since I had purchased it new as the original owner. The vehicle was taken to Authorized Nissan Dealerships for routine maintenance and transmission diagnostic test 50,220MI. During this time the vehicle was within mileage and time warranty per Nissan settlement of the CVT transmission. At the time, the transmission was experiencing surging and falling RPMs at or around 2900RPM traveling above 70MPH; heavily prevalent at speeds +75MPH. I had also mentioned to the technician the problem seems to worsen after driving for duration's when the transmission gets warmer. At lower speeds it would sometimes jerk or 'downshift' rough during accelerations. The dealership had pulled no codes during the diagnostic test, "test drove and could feel a slight trans slip/judder when going uphill especially. no codes present."(technician) The issues became more prevalent, I felt my safety was definitely at risk on the highway, as well as my car could not be depended upon for longer distant trips especially, became limiting factor. The vehicle was brought back again for routine maintenance and another transmission diagnostic 57,899MI. Surging and jerking issues had worsened. While entering a connecting highway the car had accelerated to 55MPH before 'shifting' and the had risen to 4900RPMs. Following the incident my vehicle would experience rougher 'downshifts' and jerkier acceleration than before. At this visit to the dealership the transmission diagnostic test pulled a code P17F3-Auxillary Gear Box Ratio error. I am currently seeking Nissan Motor Corporation to remedy my claim with the information presented, affecting my safety, cost of transportation and time to visit the dealership, and the significant lost value of my vehicle with its limited power-train life span of only 57,899MI.