My infinity qx 56 truck brake pedal starts to vibrate and make loud spring noises, next the vehicle will begin to pulsate violently during braking and make a loud grinding noise with an extended braking response (nearly causing me to crash into traffic ahead or in front of me). the vehicle defectively turns on the abs and brake light warnings in the dashboard while using brakes to stop at stop signs, red lights, or to make turns behind other traffic. this activation is random without cause or occurrence. i am terrified to drive my infinity 2006 qx56. i have experienced multiple near death car accidents. i have been dealing with this problem for about a year. was told it was the brakes (changed them), was told it was the rotors (changed them), was told it was the master cylinder (changed it) with no resolve. problems still exists. finally, infinity admits its a malfunction in my delta senor. malfunction to me sounds like a defective part and that is not my $1500 bullet to bite! *tr