VELLFIRE STEERING KOK KOK NOISE #ESTIMA #VELLFIRE #ALPHARD #CAMRY #PRIUS   ...Steering Wheel / Undercarriage (kok kok kok -noise) when driving on even road . Reason :- The power steering system( FLUID ) improved to the EPS(electric power steering) to reduce engine lose of power by vane pump ! The power steering turning assist by the electric motor ,gear & gear will be wear and tear to be come the extra free space , The knocking noise be occurs when u crossing the bumpy and unven road .some knocking noise (KOK KOK KOK) come from LHS also some vehicle knocking noise come from steering wheel ! 1-Steering Rack internal wear and tear ,the knocking noise come from the extra SPACE(clearance) 2-steering intermediate shaft (coupling) wear & tear