A warranty repair often remains effective until the warranty period concludes.
This condition is applicable solely if you purchase the component and incur the expense for its installation.
Several years ago, when my three-year-old BMW underwent its initial MOT, the dealer conducted the standard complimentary health assessment and contacted me to inform that the battery was subpar, offering to replace it under warranty if I desired. I readily accepted and, while knowing the response, enquired about the warranty I would receive. As anticipated, the reply indicated it would last until the conclusion of the manufacturer's guarantee, which was two days hence.
It remains preferable to incurring the expenses associated with the battery, installation, and programming.