mitsubishi outlander 2015-howling sound while accelerating
 

I bought a used mitsubishi outlander 2015 model from a dealer named motorama in Moorooka- Brisbane a few days ago, initially it wasn' t making any noise later I noticed a high pitched howling noise constantly when i accelerate (merging to highway 60 to 100 zone) , but quiets down when I press the brake.:confused: