And the list halcyon gives does not actually look like vagus nerve failure to me. Autonomic, mostly yes, but not specifically vagus failure. (Tinnitus is as far as I know cochlear nerve, not autonomic.)
Obviously the vagus nerve only enervates the ear canal and not the inner ear. I included it in that list because there may be some association between the vagus nerve and tinnitus as the NIH is conducting clinical studies on the use of vagus nerve stimulation to treat tinnitus.