NHTSA Complaint #11031720 — 2013 TOYOTA 4RUNNER

PARTIAL BRAKE FAILURE IN HIGH AMBIENT TEMPERATURE. DRIVING ON INTERSTATE I5 THROUGH NEVADA. AMBIENT TEMPERATURE 100 DEGREES F. ENGINE TEMPERATURE GAUGE READ NORMAL. STOPPED FOR GAS. ON RESTARTING ENGINE THE BRAKE BOOSTER SYSTEM DID NOT RECHARGE THE HYDRAULIC ACCUMULATOR. BRAKES WERE FUNCTIONAL BUT PEDAL POSITION WAS HALFWAY TO FLOOR AND EXCESSIVE PRESSURE REQUIRED TO ACTIVATE BRAKES. ALMOST COLLIDED WITH KERB BECAUSE OF THE SURPRISE. NO LOCAL SERVICE AVAILABLE SO CONTINUED TO DRIVE. NEXT MORNING AT 70 DEGREES F TEMPERATURE THE SYSTEM HAD RECOVERED AND OPERATED NORMALLY. SUBSEQUENT CHECK BY DEALER SHOWED NO FAULT CODES OR EVIDENCE OF FAILURE.