yes this has happened to me, my own treatment providers call this a panic anxiety attack, not a part of my dissociative problems, because it does not fit with the new dissociative disorders diagnostics.

(in short the new diagnostics for dissociative disorders contain the criterion stating the problem must not be better explained by another mental disorder, since PTSD/anxiety better explains this problem in me thats why for me its not called a dissociative problem)

the solution for me was a change in my medications. once on the right meds at the right dosage I no longer has panic anxiety attacks when riding in vehicles.

suggestion contact your treatment providers or one near you, they can help you to find the solution that right for you so that you no longer have panic anxiety attacks when in vehicles.