The articles are very similar but of course they deal with specific different brands/car types. It seems like 2/3 of them just disappeared from the Index for most of their main keywords whereas some of them still rank well (I tend to believe the older articles do). But I just don’t see a real pattern...
Just add to my previous post, some of my posts did recover simply by refreshing the content. Meaning updating the H1/H2 titles and editing some text, even if nothing significant has changed regarding the promoted product in that post. Just to make google think that the post is up to date and still relevant. You have nothing to lose by updating the articles that lost ranking, resubmit them for indexing (page has changed in GSC) and see what will happen. If it works you should see some movement within a few days. That should tell you if you're on the right track. All the best!