I have a 2008 with 137K miles. I am the second owner for the last ~40K miles. Lately, I've been getting concerned about my alternator and starter. If they fail during the summer months, I have other options but now that we're heading into winter, I'll have issues. What I am wonder is how long (miles) do the OE alternators and starters normally last. I understand that there are multiple variables in play but what are most people getting out of them? I am lucky that I have a trusted rebuilding shop about 20 miles away that I've used for other vehicles and would likely just have mine rebuilt. Is it getting toward the time that I should do this as a precautionary measure? Thanks.