Motor6D CurrentAngle Not Working?

Umm, I think this used to work, but It didn't.

local car = script.Parent.Parent
local seat = script.Parent

if game:GetService("UserInputService"):IsKeyDown(100) == true then --(100 = D Key In KeyCodes)
	car.FrontRightWheel.Tire.Motor6D.CurrentAngle = 0.1
	car.FrontLeftWheel.Tire.Motor6D.CurrentAngle = 0.1
end