Some people here have mentioned a faulty power inverter could cause high pitched frequencies. I think the high pitch is fairly common and I recall hearing it on a test drive but not on the one I purchased. I do have various high pitches that happen when accelerating hard but to me it is just normal electrical motor and electronics sounds and not something constant.
2013 Silver Ice Metallic, Jet Black Premium Trim, Bose Sound, Safety Pkg 1
Sun Country Highway/Clipper Creek LCS-25 240v Charger
Best range so far - 73.2km
Worst range so far - 29.3km