Assuming you would like an answer for a 2013 Nissan Sentra transmission in the United States, it would generally cost anywhere from $1,800 to $3,400. This price range does not take into account potential discounts or promotions that could be offered by the mechanic or dealership. The cost also varies depending on whether you need a complete replacement or a merely a repair.
A complete replacement would be necessary if the transmission is beyond repair and must be replaced with an entirely new one. The parts and labor required for this type of job would likely put the total cost at the upper end of the price range mentioned above. A mere repair may only require some minor work such as fixing a leak or adjusting gears which could lower the cost closer to the $1,800 mark.
It is important to note that these prices are only estimates and actual costs may vary depending on your specific situation. If you are concerned about how much it will cost to replace or repair your 2013 Nissan Sentra transmission, it is best to consult with a certified mechanic or dealership for a more accurate quote.