YouTuber, Car Care Nut, takes his long-term Toyota Tundra in for its annual 10,000-mile service: fresh oil, new filter, and the kind of general once-over that politely confirms everything is either absolutely fine or quietly about to become expensive.

At first glance, it all looks reassuringly solid. The truck behaves itself, the components mostly look untroubled, and everything suggests a life of dependable, unremarkable motoring.

But then — as so often happens when someone starts poking around properly — a familiar issue emerges. Not catastrophic, not headline-grabbing, but one that has been whispered about repeatedly across Toyota forums in the United States, like a rumour that refuses to die.

True to form, the inspection is forensic. Panels are scrutinised, components are questioned, and at some point the YouTuber delivers his now-iconic verdict: “that’s a problem.” Which, in his world, is not just a comment — it’s a warning siren in sentence form.