So, I bought a new brake switch, cost me RM35..not that expensive. Below is the old brake switch.
And to my surprised, after replacing the brake switch , the brake light did not turn off...how is that possible !! Then again I check and discover, on the brake lever, there is hole. Usually this is solid metal without any hole. I begin to find small rubber pieces on the flooring. This I assume there is a rubber insert...oh dear, why Hyundai make such design.
As a replacement, I place a small bolt and nut. I tested the old brake switch, it's working, but since I have bought a new one's better to change it and keep the old switch as spare.