The contact owns 2010 Toyota Prius. While driving approximately 20 mph on an uneven raised roadway surface; proceeding to make a left turn. Pressure was applied to the brake pedal, followed by an unintended acceleration. The vehicle resumed to normal operation after applying pressure to the brake pedal. The failure occurred whenever encountering an uneven road surface. The vehicle has not been inspected for the malfunction. The failure mileage was 400.

- Cherry Hill, NJ, USA

The contact owns a 2010 Toyota Prius. While driving approximately 20 mph over a rough surface she noticed that the brakes would momentarily disengage. The vehicle has not been diagnosed by the dealer. There were no prior warnings. The current and failure mileages were 2500.

- Clearwater, FL, USA

The contact owns a 2010 Toyota Prius with electronic stability and anti-lock braking system. While braking at various speeds and driving over a pothole, a bump or any change in the road surface, the vehicle would momentarily accelerate before the brakes would engage. The dealer stated that was normal for the braking system for his year, make and model vehicle. There were no recalls. The failure mileage was 5,000 and the current mileage was 19,000.

- El Grannada, CA, USA

The contact owns a 2010 Toyota Prius. The vehicle accelerated immediately after the contact drove approximately 45 mph over a bump in the road or a pothole. The contact was able to control the vehicle when the failure occurred. The failure mileage was 1500. The current mileage was 4000.

- Ridgefield, CT, USA

The contact owns a 2010 Toyota Prius. The contact stated that the brakes were momentarily unresponsive at low speeds when driving approximately 10 mph over a pothole. She stated that the failure occurred 50% of the time she drove over a pothole or bumpy surface. She called the dealer and was told that the ABS was the cause and it was normal. She called the manufacturer and was unable to speak with a representative. The vehicle has not been repaired to-date. The vehicle identification number was not available at the time of the complaint. The current mileage was approximately 4,000. The failure mileage was approximately 500.

- New York, NY, USA

The contact owns a 2010 Toyota Prius. While driving approximately 35 mph in rainy weather conditions, the driver encountered a pothole in the roadway and the anti-lock brake system engaged. Suddenly, the brake pedal traveled to floor without resistance and a no power response. The vehicle slowed down after extreme and continuous force was applied to the brake pedal. The failure occurred when there was inclement weather conditions and potholes. The vehicle has not been repaired. The failure mileage was 1,000.

- Centereach, NY, USA

The contact owns a 2010 Toyota Prius. While driving approximately 10 mph over a speed bump or a pothole with her feet on the brake pedal the vehicle lunged forward and accelerated. The dealer stated that the vehicle was performing normally since the electrical engine was switching to the gasoline engine. The failure mileage was 6,000.

- N. Attleboro, MA, USA

The contact owns a 2010 Toyota Prius. While driving approxiamtely 20 mph and making a left or right turn with the brake pedal engaged, for a fraction of a second. The anti skid light illuminated and the brakes failed to slow the vehicle down. The vehicle was taken to the dealer. The failure mileage was 3,000. Updated 03/04/10. Updated 05/14/10.

- East Falmouth, MA, USA

The contact owns a 2010 Toyota Prius hybrid. While driving approximately 20- 25 mph on a slightly snow covered road surface there was pressure applied to the brake pedal, followed by an unintended acceleration. The driver continuously applied pressure to the brake pedal; however, the vehicle failed to slow down while proceeding through an intersection. An opposing vehicle crashed into the front passenger side and there were no injuries. The police was called to the scene. The vehicle was completely destroyed and towed to a collision center. The VIN was unavailable. The cause of the failure has not been determined at this time. The failure mileage was 7,700. Updated 03/12/10. The consumer stated when he approached a stop sign with adequate distance to stop, pressure was applied to the brake pedal. When the vehicle would not stop, he had to press harder to get the vehicle to stop. Updated 07/13/10.

- Monroe Township, NJ, USA

My Toyota pruis 2010 which I purchased on Nov.30 2009 had unexpectedly lurched forward when I was slowing down and applying the brake. I was taken by surprise and fortunately it stopped after I stepped on the brake very hard. This has happened several times already.

- Alhambra, CA, USA

Whenever I am driving and hit a pothole or bump on the road, immediately after going over the pothole or bump I feel like my Prius surges forward or speeds up. This happens whenever I am going at a constant speed or when I'm braking. It has happened since I bought the car (two months ago) but yesterday morning it scared me more because I was going over a really bad road with many bumps. As I approached a red light I began to brake early but as soon as I got close to the stop there was a bump before it and my car lunged forward causing me to stop past the white line of the stop sign. This happens all the time when I hit a pothole or bump on the road.

- Chicago, IL, USA

Sudden temporary loss of brakes in a 2010 Prius.

- Burlington, NJ, USA

When my 2010 Prius goes over bumps the brakes disengage for a second or two and the car lurches forward. This has happened several times.

- Scarsdale, NY, USA

2010 Prius - brakes stop working if they are being applied when car goes over bump or uneven road service.

- Scarsdale, NY, USA

I own a 2010 Toyota Prius which was purchased in September 2009. My brakes fail to immediately stop my car when applied going over bumpy sections in the road, hitting a pothole, or when on slippery sections of the road. When hitting a bump it actually feels like the car lurches forward. The car will eventually stop after pushing the brake to the floor with force. It is very disconcerting and the potential for hitting the car in front of you or a person is very high.

- Rochester Hills, MI, USA

Prius braking problem when going slow speeds over a bump or pothole.

- La, CA, USA

Applied brakes at a stop light. The Prius (purchased in July of 2009) ran over a bump, and it seemed like the brake disengaged. I removed my foot from the brake pedal and reapplied the brakes. The brakes seemed to engage and came to a stop.

- Walnut, CA, USA

I've owned my 2010 Toyota Prius for 5 months now and frequently (at least twice a month) experience problems when braking on uneven ground. When I am hitting the brakes and run over a pothole or sudden bump, the car stops slowing down and almost shoots forward (feels like I'm hydroplaning) for a split second then resumes braking. This happened most recently today and could have caused an accident if I were closer to the car in front of me when it occurred.

- Sandy, UT, USA

My 2010 toyata Prius (purchased in Sept. 2009) has had repeated problems while braking over a patch of road with small potholes. If the brakes are engaged while over the patch of uneven road, the car lurches or "jumps" over the spot on the road and the brakes don't begin to catch until the car gets over the patch. This has happened 5-10 time over the last four months at a stop light.

- West Greenwich, RI, USA

When applying the brakes to come to a stop at a red light, my 2010 Toyota Prius iv hit some rough road and began to surge/accelerate even with my foot on the brake. I pressed harder until the brakes were re-engaged. This has happened under similar circumstances (rough road) three times since taking ownership of the car Sept 15, 2009.

- Los Angeles, CA, USA