Vehicles with a manual transmission similarly start engine braking the moment you lift your foot off the accelerator but I never attributed any sense of motion sickness to that, though the braking force likely is lesser.

The way I've always understood this is that since passengers usually sit in the rear they're looking out the side windows and that scenery flying by so fast is what causes that motion sickness and it doesn't happen to the driver or front-seat passenger so much because they're looking forward through the windshield.

[–] nogooduser@lemmy.world 2 points 2 weeks ago

I can feel sick due to engine braking and it doesn’t matter whether it’s a manual or an automatic as it happens with both. I leave my auto on the comfort setting and it can still cause sickness. The sport mode is worse and the eco mode wouldn’t cause sickness as it doesn’t have engine braking (I assume that it does the equivalent of dipping the clutch when you let off the accelerator)

As I understand it any unanticipated movement can cause motion sickness. I can’t read in a car otherwise I get sick really quickly. I can get sick in the front passenger seat even if I don’t read.