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2010 Toyota Prius engine NHTSA complaints: Vehicle Speed Control

NHTSA — Vehicle Speed Control Problems

2010 Toyota Prius (Page 4 of 14) Seal Of Avoid Like The Plague


really awful
Crashes / Fires:
33 / 1
Injuries / Deaths:
10 / 0
Average Mileage:
11,788 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2010 Toyota Prius engine problems

engine problem

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2010 Toyota Prius Owner Comments (Page 4 of 14)

« Read the previous 20 complaints

problem #210

Nov 162010


  • 1,500 miles


My wife was driving our new 2010 Prius home on 16 Nov 2010. As she was turning the car into our driveway at approx 5:30 pm the vehicle lunched forward at great speed on its own. We have a long driveway, it took her about 30 to 40 feet the get the vehicle stopped. While pressing on the brakes the drive tires kept spinning and left rubber marks in the driveway. Bought the vehicle from rick hendrick Toyota in Sept 2010 in fayetteville, nc.

- Raeford, NC, USA

problem #209

Sep 272010


  • miles
2010 Toyota Prius. Consumer states sudden unintended acceleration the consumer stated the vehicle suddenly accelerated from 35 mph to 45 mph. He was able to stop the vehicle by applying the brakes.

- Henderson, NV, USA

problem #208

Aug 222010

Prius 4-cyl

  • 19,000 miles
We were backing down our driveway in our 2009 Toyota Prius. As we approached the street our car suddenly made a loud whining noise and started accelerating backwards. Before we could do anything, we backed into the car parked across from our driveway. After we collected ourselves, we decided to move the car out of the street into our driveway. The sudden acceleration happened again, but this time my husband reached over and hit the park button and we stopped before we hit anything. I have driven our other two cars down our long driveway since, and we only use the accelerator to start the car moving. After that, we are braking all the way down the drive. The acceleration occurred near the street where we pause to check on the traffic. Now that I have checked myself with our other cars, I am sure I did not have my foot on the accelerator pedal at the bottom of the drive, as I brake all the way down. Our Prius is over at the dealer, and we have filed a complaint with Toyota. We are afraid of the car. We did have the car fixed at the recall.

- Webster Groves, MO, USA

problem #207

Aug 272010


  • 6,000 miles


The contact owns a 2010 Toyota Prius. While driving at less than 5 mph, the contact was coming to a stop to park her vehicle when the vehicle accelerated on its own. The brakes were applied where they did not engage. The vehicle crashed into a brick wall and there were front end damages and no injuries. The vehicle was towed to a Toyota collision shop. There have been no diagnostic test to indicate why the vehicle accelerated on its own. The failure and current mileage was 6000.

- Tuscan , AZ, USA

problem #206

Aug 012010

Prius 4-cyl

  • 13,000 miles
The contact owns a 2010 Toyota Prius. The contact was braking from 2 mph when the vehicle independently accelerated. The contact applied the brakes and the brake pedal fell farther into the floorboard than normal. The vehicle went over a curb, sidewalk and over a grassy area before crashing into another vehicle. The front end of the vehicle was severely damaged. There were no injuries. The vehicle was towed to a an authorized dealer where the contact was awaiting a diagnosis of the failure. The vehicle was not repaired. The failure and current mileage was 13,000. Updated 11/23/10 updated 11/23/10

- Kentwood, MI, USA

problem #205

Jun 222010


  • 200 miles
Twice now my brand new 2010 Prius iv has failed to accelerate when I was driving. June 16 purchased the car. June 22 at a stop light on a surface street, continued on green light, car lost power in the intersection and I coasted to a stop. Restarted, and fine until August 3, 1443 miles on the car, when I stopped for gas, continued on to the highway, up to 65 mph, and car lost power again, would not accelerate, went down to 42 mph, and I coasted to the shoulder. Turned off power. Restarted, and fine again.

- Los Gatos, CA, USA

problem #204

Mar 132010

Prius 4-cyl

  • 1,700 miles


The contact owned a 2010 Toyota Prius. The contact was braking from 2 mph when the vehicle abnormally accelerated. The contact was unable to stop the acceleration as the vehicle crashed into the asphalt of a driveway. The contact sustained moderate injuries. The vehicle was towed to an authorized dealer. The manufacturer sent an investigator to further inspect the failure. The investigator stated that the brake and accelerator pedals were depressed simultaneously, causing the failure. The contact was advised there were no failures found in the vehicle. The contact refused to drive the vehicle and purchased a new vehicle. The current and failure mileages were approximately 1,700. Updated 11/19/10. The consumer stated she had no control of the vehicle, it just suddenly accelerated on its own. The vehicle jumped over a curb bordering the parking lot, then over a drainage depress/grass median through a sizeable shrub edge. The vehicle then slammed into a concrete sidewalk and down to the street curb, finally stopping with the motor off and having blown two tires. Updated 12/01/10

- Globe, AZ, USA

problem #203

Feb 012010


  • 5,000 miles
Toyota Prius 2010, my problem is sometimes the gas pedal does not release when trying to stop, I have found that by releasing the brake pedal the throttle releases, this always happens under the speed of 40 mph. This problem is always random, and you never know when it will happen, it has happened about 30 times so far, this started about 6 months ago. Is this problem part of the recall.

- Ocean View, NJ, USA

problem #202

Jul 312010


  • 4,200 miles
The cruise control disengage mechanism in my 2010 Toyota Prius does not disengage quickly enough when depressing the brake. I have to press the brake harder than any prior vehicles I have owned to kill the cruise control and if I release the brake before the cruise control is released then the car lurches forward. This is a safety issue with this vehicle and I called Toyota and they said that there is no safety issue and would not speak to me further about it without going to the dealer. The dealer had already told me that it is operating normally and that this is how the 2010 new Prius model year operates. I have a 2006 Prius as well and the cruise disengages normally. Many other people have experienced this issue and have documented their experiences on the forum They have even fixed the problem themselves by moving the cruise control disengagement closer to the top of the brake pedal. Others have reported that they can depress their brakes and slow down the vehicle without their brake lights coming on and this is the same problem because the brake lights and cruise control kill switch are linked together.

- Piedmont, SC, USA

problem #201

Jul 232010


  • 2,236 miles
Case of sudden unintended acceleration in a new 2010 Toyota Prius: I was parking my car in a pull-in parking spot in an office building parking lot. While straightening the car out in the spot, it suddenly accelerated out of control and jumped a curb in front of landscaped shrubbery. A large woody bush, and soft dirt stopped the vehicle. No one else was involved in the accident. The car has only 2200 miles on it. The car is currently being held by the dealer, Toyota Scion of eatontown, NJ.

- Monmouth Beach, NJ, USA

problem #200

Jul 272010


  • 18,500 miles


Was driving Prius 2010 model II with brake software applied by dealer about 1.5 months ago. Today (7/27/2010) I exited highway and began gentle braking on offramp, as suggested by manual to maximize regeneration. About half-way down offramp, I realized car in front of me was completely stopped and that I had to stop much more quickly than I was planning to. I don't recall being particularly distracted, but I can't rule out I noticed the stopped vehicle later than I should have. In any event, I'm not sure how hard I pressed the brakes, but I recall distinctly thinking "oh, my god. Nothing is happening" and 1-2 secs later I plowed into the car in front of me. The collision was hard enough to cause temporary pain to the driver in front of me, but no air bags were deployed and the Prius appears to not have major frontal damage - hood is bent back and maybe slight frame distortion => the impact clearly was not at the ~40-50 mph I was going when just exiting the highway, so some braking clearly did occur -- but I have the distinct feeling that my previous car (Subaru outbook) would have easily stopped in time. After accident, I tested brakes by going 15-20 mph in parking lot and braking hard. Always stopped quickly, I'm guessing w/100% friction braking. So brakes are probably not "defective" in sense of lost hydraulic fluid, etc... but I have never before experienced the feeling "I'm not stopping" except once when losing traction on icy road with a non-hybrid. The fact had time to think this thought at all probably means maybe 0.5-1.5 sec passed while braking ineffective. Checked for tire/skid marks on road or evidence of strong tire wear and found none, while I have on other cars when I have had to brake hard => Prius not braking hard despite emergency. Seem to have been caught in transition between regen & friction mode" this is still discussed in Prius forums -- software fix not good enough!" this is potentially very dangerous. Btw, car was in "eco" mode.

- Madison, CT, USA

problem #199

Apr 042010


  • 400 miles
New 2010 Prius ll commuter car suddenly accelerates or scoots when both feet are on the brake. The vehicle takes the same route to and from work daily. On every trip, when the right front wheel passes over a recessed manhole, the vehicle accelerates. I immediately push harder on the brake to stop the vehicle. The manhole is about 30 feet in front of an intersection, so I am already decelerating and braking when I cross over the manhole. This is scary because, if I the car doesn't stop, it will take me out into the middle of the intersection. Both feet are on the brake. I have driven for over 40 years, and this the strangest thing I have ever experienced.

- Bloomington, IN, USA

problem #198

Jan 102010


  • 8,000 miles
My 2010 Toyota Prius loses braking ability and lunges forward while braking on any uneven surface I.e. pothole, manhole cover, bump metal plate or strip, etc... this has lead to several near miss collisions and due to the amount of time I spend in the car happens an average of 3 times per day. Because I fear for my own safety I do not allow passengers in my car and I will not let anyone else drive my car. I've had to adjust my driving to try and compensate for no braking ability at any given time. I have now reported this problem to my dealer Toyota of merrillville in person 3 times and over the phone on several occasions and each time I was told they were unable to duplicate the problem and therefore there was no fix they could offer. They also tell me that I am the only customer reporting this type of concern but I have been able to connect with many Prius owners experiencing this loss of braking while over uneven pavement. I believe Toyota is downplaying this problem at the risk of public safety.

- Crown Point, IN, USA

problem #197

Jun 142010


  • 1,000 miles
I have a 2010 Toyota Prius that has the problem with the brakes sometimes dis-engaging when the car goes over uneven or slippery surfaces. Toyota was unable to fix this problem after I brought it in for the recall. The problem remains so I am stuck driving an unsafe car.

- Philadelphia, PA, USA

problem #196

Jun 032010


  • 9,872 miles
Today at yet another check for my 2010 Prius to try to discover the cause for the continual surging, I was informed that 160 times in the last 1 1/2 months I have driven with both the gas and brake pedals depressed simultaneously. This is a ridiculous assertion and completely false. Obviously there is an issue with the computer software in my Prius brakes. This is further evidence that there is a serious safety issue with the Prius brakes.

- Colorado Springs, CO, USA

problem #195

Apr 142010


  • 8,400 miles
2010 Prius engine accelerates when braking over bumps/gravel. Brought car back to Toyota dealer for recall modification and problem still exists, in fact, seems worse.

- Toluca Lake, CA, USA

problem #194

Sep 252009


  • miles
I have a 2010 Toyota Prius purchased in July 2009. During ownership I experienced when there was a crease, hole or bump in the road when braking - it accelerating and lunges. I avoided situations like that and when the recall came, I took it to butler Toyota (also had the floor mat hooks installed prior), on April 5, 2010. They supposedly fixed it. About a week later, I came upon a manhole cover in a road while braking and making a turn so going slow, and the same thing happened. The next day I purposely went through it to "test" and it did the same thing but lunge into the other lane. I was scared and called butler Toyota. They told me to call national Toyota to report. They contact butler and I went back in May 21, they did not repair it and "shrugged" their shoulders saying it's the ABS. They offered to have a field tech person come drive my car. I called national again and they seem to be "mediating" this with butler. I found a report from that this very similar issue was occurring back in 2008 and they called it "traction control". no one from Toyota has told me this. I want it fixed or a different car. I have a teenage with a permit and if he was driving this and it occurred, he would probably run into someone because it takes you by surprise. I do fear him driving it due to his inexperience and I frankly am concerned and am very cautious as a result.

- Carmel, IN, USA

problem #193

May 232010


  • 7,195 miles
At about 7:45 am Sunday May 23, I was driving West on hamburg turnpike in wayne, gently accelerating to get better mileage, the light at berdan ave and hamburg had just turned green, so I accelerated slowly to about 40 mph. At this point, I hear a shrieking beep and the car lurches forward as the brakes were applied. The dash lights up with the usual message square and the word brake! in the box. I look in all directions and saw nothing until I bounced over the construction plates. The box was gone, and the car resumed normal operation. I was puzzled. I thought it could be the plates. I checked with my son and he reminded me that in the model 5 we have radar crash avoidance. Upon further review I wanted more information. I took my son, and a camera, and drove the route again. Eureka! in all three attempts, the brakes were applied. I have pictures of the dash, and the plates. Did the car perform correctly? the second plate is not flush to the road and sticks out to the left. I think other drivers need to be aware of this possibility so they do not panic when it happens. The crash avoidance system could have been doing its job correctly. I contacted wayne police about the incident and the dispatcher said after consultation it is a county road, call the passaic county road department. My car computer will have recorded all 3 incidents. The third was not as big a jolt because the driver ahead of me had slowed considerably when he saw the plates. There is a warning sign that is beyond the plates in the picture. Let me know if anyone in service is interested in the information since this is a new feature and I know as a computer programmer of some 40+ years that a system does not always get tested for all possible events. I also cannot believe that unlike nyc where there must be no bumps or raised plates during construction that passaic county allows these plates to be installed without being flat or asphalted around the edge.

- Wayne, NJ, USA

problem #192

Apr 182010


  • 17,966 miles
After taking my 2010 Prius in for the recall fix on April 1, 2010, the vehicle continued to exhibit safety defects. I reported this to the dealer who reported it to corporate and arranged for a field tech to analyze the vehicle on April 13th. They said we would hear from Toyota with in two weeks I never heard back from the dealer so I called the dealer last week. Dealer had not heard back. I filed under the lemon law. Then dealer informed me yesterday 5/17 that the car was healthy and there is nothing more they can do. My car experienced the same brake failure this morning, turning into a parking lot.

- San Clemente, CA, USA

problem #191

Apr 152010


  • miles
The contact owns a 2010 Toyota Prius. While driving approximately 30 mph and attempting to accelerate, the vehicle would not increase in speed. The contact continued to apply continuous, steady pressure to the accelerator until it finally began to accelerate. The contact stated the failure would occur sporadically, most often when accelerating from a complete stop. The dealer was unable to duplicate the failure and the vehicle was not repaired. The failure and current mileages were unavailable.

- Spokane, WA, USA

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