Here are Nissan Xterra transmission problems, by model year. The most common Xterra transmission problems cost $4,000 to fix & occur at 110,000 miles. Regarding the worst model year 2005 Nissan Xterra transmission problems, "The 2005-2007 Xterra appears to have a widespread defect where coolant leaks into the transmission, causing transmission failure around 90,000 miles. Repair costs are typically upwards of $3,500." Click on a year below.

Worst Transmission Problems
radiator leak causes transmission failure 2005 Nissan Xterra
coolant leaked into transmission 2006 Nissan Xterra
coolant leaked into transmission 2007 Nissan Xterra