Aux Battery Replacement
If you’ve been putting it off (which I don’t recommend) I just wanted to say it’s not that bad to do.
Dealership is going to charge you an hour plus the cost of the battery to do. Took me about the same sitting on my ass in my garage with: a jack/jackstand, a 10mm socket and extension and a trim tool (plus something to take the tire off with). Pop off the front passenger tire, pull back the fender liner after trying to break as few of those fragile plastic clips as possible. The little bugger is right there. 3 10mm bolts, two 10mm nuts, and a bit of swearing and it was out. Just gotta move the two little threaded studs to the new battery and reverse the process with a little more swearing because even 10lbs gets a little heavy while you’re trying to feed the bolts in. There is another way to do it from the top but that requires pulling out the big battery, the battery tray, moving another mess of wires out of the way and then getting down to the Aux battery. If you have access to a hoist I don’t even think you’d have to pull off the tire doing it the other way. It’s really not that hard to do with just basic hand tools and you’ll save yourself a few hundred dollars.