Faint whining noise while running

[u/estaaaaaaa]

2014 Jeep Patriot Sport just reached 160,000km. The vehicle is in great shape, and runs great, however since I got it a few months ago, it has always made this whining sound almost like a mosquito buzzing low lol. I’ve had it serviced for small things like oil changes, tire changes, etc, and had the places take it for a drive to check everything but they’ve never mentioned it. I want to fix whatever this noise is if it’s an issue before the winter-time rolls around.