Quote:
Originally Posted by HPIA4v2
So if you replace the batt with AGM, it needs to be registered but not if you buy regular sealed-lead-acid.
Maybe I am missing something here.
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No, all new batteries need to be registered so the car knows it's new. Otherwise voltage levels throughout the car will be messed up. I don't understand why it is this way exactly but my diagnostic report proved to me that it's necessary.