I found this Forum & topic after Google searching for 2018 Lincoln MKX battery replacement / installation. Found a few helpful videos, but the best find was this topic. I got the new battery installed without wrecking anything lol. Then I followed the above procedure to reset the BMS. My first attempt didn't seem to work, probably because I messed something up while getting thru the steps 1-4. I shut the ignition start button off, waited about 30 seconds and then repeated the steps 1-4. This time I just watched my battery icon dash light and after maybe 10-20 seconds it blinked on & off 3 to 4 times and then stopped. So I think the BMS has recognized the new battery ok. Thanks.