[jakeman]

We have the same car, except with 50,000 miles on it. Still on the original battery with no issues. 4 years is not an indication of imminent failure. My 2009 Honda Ridgeline's original battery lasted over 9 years. It didn't fail but I replaced it proactively due to the upcoming winter.

Have it checked if you're worried. As said previously, the way you use the car has a lot to do with battery longevity. These newer vehicles have more electronics and things like electric power steering that may affect battery life also.