UWVUnwrap fucks up smoothing


I have been redesigning a car dashboard on a ported car from Need For Speed Shift but every time I add UVWUnwrap modifier the smoothing fucks up. It seems as entire object becomes oversmoothed. Edges that seemed like edges before now become oversmoothed and barely noticeable, like on the fuel and heat gauge: (probably not well visible on this pic :frowning: )


Am I doing something wrong or is this normal?


Edit: Better comparison:
first pic is normal, second is after applying UVWunwrap