I think one of my struts has gone bad. I have 32k miles, would that be covered under warranty?

 

It should be as long as the car is still under warranty. I think the bumper to bumper is 4/60.

 

They are covered against leaking not against wear and tear [the slow steady progressive decline in stiffness].

Shocks should be replaced [at owners expense] every 4 years or 60k if even close to new specification and feel are desired.

Same as all rubber bushing are covered against cracking not the shore A durometer changes from exposure to heat, salt, and ozone.