my 2005 nissan altima serpentine belt keep coming off what could be the problem on 2005 Nissan Altima

its fine for a while but all of a sudden the belt comes off put on a new belt last about a month and it starts to do it again

by in Tampa, FL on September 05, 2012
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1 answer
ANSWER by , September 06, 2012
A pulley is not aligned, the wrong size belt or it is not adjusted properly.