As Paul Harvey used to say, "Now you know the rest of the story."
March 8, 2013 - Nissan received a report from a dealer of a spare tire rapid deflation while stored in the trunk. Nissan initiated an investigation into this report. Nissan commenced a yard audit and dealer inspection activity to determine if there were any additional incidents. Nissan also contacted the spare tire supplier, Maxxis, and asked it to investigate.
Analysis of the incident spare tire revealed that the tire had been significantly over-inflated, compromising its structural integrity. As a result of the increased temperature in the trunk, combined with the over-inflation condition, the tire lost structural integrity resulting in rapid deflation.
Nissan confirmed that the spare tire inflation machine used in the manufacture of MY 2013 Altima vehicles at the Canton plant had a malfunctioning pressure regulator, and the pressure gauge used to check pressure was not calibrated correctly. These issues were corrected on March 26, 2013.