One problem related to alternator/generator/regulator has been reported for the 2005 Nissan Sentra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Nissan Sentra based on all problems reported for the 2005 Sentra.
Squealing noise under hood reported, told could not duplicate noise. 4 months later returned vehicle to shop. Was told noise is coming from belts whose coatings are cracked but belts are good. Cost $170 plus tax to replace good belts. Apparently the belts used on my 2005 Sentra was defective.