After my oil change this week, I grossly improved the magnetic oil filter channel.
You can find the file here:
https://makerworld.com/en/models/3151899-4th-gen-tacoma-v2-magnetic-oil-changing-channel?from=search
I switched from SketchUp to Plasticity for CAD, and it opens up a different...
If Toyota thought they would increase longevity, they would come with one.
If the water freezes in the can, it'll more than likely blow your rear seal, and guess what the dealer will say about your warranty?
Six-bits says it ends up being your battery. I, too, would be looking at the voltages, but as you know, that's just the surface charge or some such magic.
Take it to a parts house and have them test it on their box.