TSB: Revision Notice - August 2, 2016 Rev1 - Applicability has been updated to include 2015 - 2016 model year Sienna vehicles. Any previous printed versions of this bulletin should be discarded. Some 2011 - 2016 model year Sienna vehicles may exhibit a vibration/pulsation from the front brakes that can be felt in the brake pedal while lightly applying the brake pedal. New front brake pads and a new field fix repair procedure have been developed to improve this condition.