Car in question is a 2018 V90 Inspiration T6 AWD.
I have read lots of posts about the dreaded feels-like-an-out-of-balance-tire vibration, but all of a sudden, I now have it too, so it has become more personal.
Came out of nowhere. Car has run just fine for 18,000 miles and two years. The other day, on I84, at 55 mph it started. Feels like the haptic warning you get when you're changing lanes without signalling, with the lane-keeping feature engaged, though not as harsh. In other words, no big deal, I can live with it for awhile, but suddenly there's something going on. It's consistent. A hint of it appears at 50 mph, and by 55 it is unmistakable.
Tires are Continentals, original equipment, so there's no foam belt coming loose inside them, like on the Pirellis. Tire pressures are normal--36 psi--and I definitely haven't hit anything or even gone over a speed bump.
I can feel the vibration through the steering wheel as well as through my butt, but it's not like the wheel is actively vibrating, it's just communicating the high-frequency shake.
The car was a factory order. It left Gothenberg in June 2017 and I took delivery a month later. Does it sound like I need a new revised axle?