I think it is 3 years. There may be an extended warranty option but that would be something to get in writing.
I think that really depends on the battery warranty itself. Typically batteries have their own warranty
Should last up to 5 yearsi have a 2013 avalon and i my battery died after 2 years.. I was not too happy to hear its not cobered under warranty
I don't know the answer to that question. Sorry
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