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2008 Nissan Sentra Transmission

Have her contact Nissan directly. The powertrain warranty is 5yrs or 60,000 miles whichever first.

The secondary poster’s car may or may not be under a powertrain warranty even if within the time/mileage limits.

Servicing with the wrong fluids by someone else or failure to follow the factory recommended service interval can kill any warranty claim pretty quickly.