At 160k miles on my Tundra, the alternator went out this week (which was a fiasco!). It got me thinking, my wife's 2014 4Runner has 200k miles, and we use it for long road trips (Houston to Gulf Shores in May and Colorado again in December). Is it a good idea to go ahead and replace it before either trip, especially before the winter Colorado trip? Feels we are in the window for it to start falling.