That is the servo motor, but if i remember correctly the white arm that normally breaks is not sold seperately unless you can fix the broken one. MIne has been broken since i got the car back in 2013, only when i took it all apart the broken piece was nowhere to be found. Guess the person that broke it threw it away and kept quiet about it. i did once find a part number on the us lexus forum for the link arm but cannot find it at the moment. So i have lived with it.