Summary: Could not stop car using brake pedal. Needed to use park brake to stop car. Later discovered leak in L. rear brake pipe, near end of it. However, my car has a split service brake system. (one hydraulic circuit for brakes in L. rear and R. front; and, another circuit for brakes in R. rear and L. front.) so, my car had one failed circuit, due to leak in L. rear brake pipe; and, one good circuit for brakes in R. rear and L. front. But, good hydraulic circuit failed to stop car. Therefore, car failed to perform as specified by the electronic code of federal regulations, title 49, chapter V, part 571, section 571.135, paragraph S7.10, hydraulic circuit failure. Diagnostic notes: (a) master cylinder, both front calipers, and both rear wheel cylinders appear to work correctly, (B) no fluid leaks anywhere except in L. rear brake pipe, and (C) brakes in good hydraulic circuit are within specification limits. Refer to attached photos and documents.

- Wilson, NY, USA

The contact owns a 2006 Pontiac Vibe. The contact stated that while attempting to merge into traffic she engaged the brakes but it failed to stop the vehicle. The contact mentioned that she had to shift into neutral in order to maintained control of the vehicle. The vehicle was taken to the dealer, who was unable to diagnose the failure. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was 41,000 and the current mileage was 43,075.

- Rockwood, PA, USA