Here's the battery I bought:
https://www.autozone.com/batteries-starting-and-charging/battery/p/duralast-platinum-agm-battery-bci-group-size-51r-435-cca-51r-agm/229893_0_0
It installed perfectly. The vent tube fit without any modifications.
I decided to reread the thread and have decided on a generic 51R AGM battery. It's $250, but battery off-gassing in cabin doesn't sound good. I'll report back.
I know this is an old thread, but my 2018 outlander phev battery prevented the car from starting today in cold weather. Battery size searches (where u enter the vehicle year model, etc) turn up nothing. (Or "Go to dealer" messages).
I was looking at the battery and it seems nearly identical in...