Not in 7 years, anyway! It does tend to concentrate a bit--you may need to use slightly less.
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"Pure" vanilla extract should have an indefinite shelf life but you will have to look at your bottle for a list of ingredients. Modern commercial extracts (despite being advertised as "pure") will have corn syrup and artificial colorings added which may spoil over time.
I have some pretty old vanilla extract and have never had it "spoil", although it does seem to develop a precipitate in the bottom of the bottle.