really awful
Crashes / Fires:
29 / 1
Injuries / Deaths:
9 / 1
Average Mileage:
45,163 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.

2005 Toyota Prius engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2005 Toyota Prius:

Unsubscribe any time. We don't sell/share your email.

2005 Toyota Prius Owner Comments (Page 5 of 5)

« Read the previous 20 complaints

problem #15

Mar 012006


  • 10,000 miles


I have a 2005 Toyota Prius. When it was 8 months old, probably already with more than 10,000 miles on it, it suddenly stopped on the highway when it was running. It was fixed by a Toyota dealership in wellesley, MA and they said the problem was with the codes for the electronic throttle (something I knew nothing about at the time). They said however that they needed to get codes from California. I don't know if they knew at that time about an existing broader problem but didn't want to tell me, since I was a new Toyota Prius owner at the time. I found it puzzling that they could not fix the problem locally. Lately, I've been hearing about the recall of various Toyota cars so I wanted to let you know about my Prius just in case: 1) sometimes, when the car is put in park, the engine suddenly revs up for no reason (I'm not pressing on the gas pedal) 2) very occasionally, I drive over a pothole and as the car is re-contacting the ground, the engine again seems to rev up. This has not resulted in an actual serious acceleration yet I don't believe that there is any problem with the floor mats or pedals. The floor mats fit nicely around the pedals. Aside from the above, my Toyota, which I drive a lot (it has more than 100,000 miles already) has done rather well, with minimal serious problems. I've been good about getting it serviced regularly. Please feel free to contact me with questions.

- Framingham, MA, USA

problem #14

Jan 232010


  • 75,000 miles
The contact owns a 2005 Toyota Prius. While driving 5 mph attempting to park her vehicle it accelerated into a trailer hitch on a truck. The contacts license plate fell off of the vehicle, the bumper and vehicle had minor damages. There were no injuries. There was no need to contact the police and there were no damages to the other vehicle. The vehicle was towed to the dealer where the Toyota representative stated that there were no problems with the vehicle. The Toyota manufacturer was not notified. The failure mileage was 75,000.

- Walnut Creek, CO, USA

problem #13

May 012006


  • 20,000 miles
1. multiple events, in order of frequency: A) high speed w/cruise control (65-75mph) B) high speed before braking (65-75mph) C) hitting a bump before braking 2. multiple events: A) car suddenly accelerated on its own and was difficult to slow / occurred multiple times, maybe 12-15 occurrences / gained control by turning cruise control off and firmly pressing on brake pedal B&C) car was initially unresponsive to braking / multiple times, approximately 3-5 / eventually slowed after firm compression on the brake pedal 3. multiple events: A) I no longer use cruise control B&C) I am very observant whenever I brake.

- Poway, CA, USA

problem #12

Dec 252009


  • 56,000 miles


The contact owns a 2005 Toyota Prius. When driving 65 mph, the vehicle will stall without warning. The vehicle was taken to the dealer for inspection, but because the failure could not be duplicated no repairs were made. Two weeks later the vehicle stalled again, but would not restart. The vehicle was towed back to the dealer. The technician stated that there was no fuel present in the fuel tank. However the vehicle had two quarters of fuel in the tank. Also when the cruise control was disengaged the vehicle would begin to accelerate. The failure mileage was 56,000.

- Woxall, PA, USA

problem #11

Aug 152008


  • 4,000 miles
I eased to a stop in a parking spot in a parking lot. When I eased off the brake my Prius surged forward, jumped the curb, grazed a light post & stopped against a bush. The gas pedal did not catch on the floor mat.

- Philadelphia, PA, USA

problem #10

Nov 012009


  • 35,000 miles
I have not had an accident, but I have had sudden accelerations or surges on my 2005 Toyota Prius on a number of occasions. They have been brief, and the vehicle has not reached a high speed, so I was not too concerned. I just assumed the problem would be addressed by regular servicing. These had nothing to do with the accelerator being stuck. A friend's Camry accelerated and crashed through the wall of her garage. She also believes this was not related to a stuck accelerator pedal. I urge you to revisit the potential of software problems causing sudden acceleration on Toyota vehicles.

- Watertown, MA, USA

problem #9

May 142007

Prius 4-cyl

  • 33,000 miles


The contact owns a 2005 Toyota Prius. While driving approximately 70 mph with the over drive system activated, the vehicle accelerated without warning when brakes were engaged. Immediately, the overdrive control switch was deactivated and the vehicle slowed down. The contact was able to resume normal operation. The failure recurred and has not been repaired. The contact had concerns of the safety risk involved. The failure and current mileages were 33,000. Updated 12/18/09 the consumer stated the issue was not caused by floor mats, because she installed rubber mats soon after purchasing the vehicle. Updated 12/22/09

- Bakersfield, CA, USA

problem #8

Nov 202005


  • 37,000 miles
The contact owns a 2005 Toyota Prius. While driving the driver side floor mat shifted under the accelerator pedal. Consequently she could not decelerate. The vehicle was taken to the dealership for inspection. She was advised that the floor mat hooks needed to be repositioned. The current and failure mileages were 37000.

- Torrance, CA, USA

problem #7

Sep 012008


  • miles
I am attaching a link to a story in the houston press about unintended acceleration of Toyota Prius automobiles. I truly believe this story deserves investigation, and as a Toyota Prius owner, I would like to see Toyota investigate the cause of this potentially tragic issue and resolve it before a fatality results. www.houstonpress.com/2009-04-23/news/wild-rides.

- Houston, TX, USA

problem #6

Mar 062007

Prius 4-cyl

  • Automatic transmission
  • 34,800 miles
My 2005 Toyota Prius accelerated even when the accelerator pedal wasn't depressed. The brakes were burned off the car in an attempt to bring the vehicle to a stop. The car crashed into the side of a gas station. There were no injuries to people, but the car was destroyed by the impact and a fire. The side of the gas station was damaged.

- Dupont, WA, USA

problem #5

Nov 012006

Prius 4-cyl

  • Automatic transmission
  • 1,000 miles


I have a 2005 Toyota Prius, purchased in September 2006. Ever since I've owned my 2005 Prius, I have experienced unintended acceleration on a regular basis. It most often happens on a particular street in my neighborhood where I need to stop before entering a main thoroughfare. There is a very slight decline just before the road terminates at an intersection. I'm always traveling at a relatively slow speed (15-20 mph), coasting and not depressing the gas peddle when it occurs. Just at the point where I begin to brake, the car suddenly lunges forward and accelerates. I have to hit the brakes, and the car feels like it's still going forward, and the traction control light on the dashboard comes on. This first time it occurred was during the winter following purchase of my car. Initially I thought that the car performed poorly in snow because the traction control light was coming on. But then after that first winter passed and the roads were completely dry, it happened as well and continues to happen regularly. Fortunately it always happens under these very particular circumstances when I'm not traveling fast, otherwise I fear not being able to stop the car and plowing into a main street, or hitting a car in front of me, or worse hitting a pedestrian.

- Canton, MA, USA

problem #4

Jun 142006

Prius 4-cyl

  • Automatic transmission
  • 18,360 miles
I was driving on a highway at approximately 65 mph. Vehicle suddenly went into uncontrolled acceleration while the vehicle was in operation on the highway. The only way that I was able to slow down the vehicle was by riding the brakes. I finally slow down the vehicle with the brakes and turned it off. Smoke was coming out of the wheels when the vehicle was turned off. Vehicle was towed to the dealer.

- Woodland Hills, CA, USA

problem #3

Apr 232006

Prius 4-cyl

  • Automatic transmission
  • 8,063 miles
: the contact stated the vehicle stalled on two separate occasions. The first time it occurred was on April 7th while driving at a steady speed of 25mph. The second time it occurred was on April 21st while driving at a steady speed of 5-15 mph. All the warning lights illuminated and the vehicle was pulled over. Once pulled over, the vehicle would not go back into the drive position. Afterwards, it stalled and would not restart. The stalling occurred 3-5 minutes after it was pulled over. The vehicle was towed to the dealership both times. The first time the dealer replaced the entire transmission. The second time the dealer replaced the inverter. On April 23rd while driving the dash board lights became inoperable including the speedometer, and the gear indicator. The contact alerted the dealership by phone who explained the problem was likely the circuit board and it was okay to continue driving the vehicle. Afterwards, the vehicle began to blow out hot and cold air and the dealership was alerted again which explained it was okay to continue driving. Shortly after it began to rain, the wipers were turned on, and the dash lights became inoperable once again. The vehicle is scheduled for inspection on Monday May 8th.

- Madison, WI, USA

problem #2

May 112005


  • Automatic transmission
  • miles
While driving at approximately 68 mph the vehicle began to loose speed. The consumer was able to pull the vehicle off to the side of the road and park. No warning light illuminated indicating there was a problem. The consumer had been driving for about an hour at 68 mph when the vehicle began to lose power. After the vehicle sat for about 1 1/2 minutes the vehicle operated as if nothing had happened. The consumer heard one beep, then the vehicle lost all power. The consumer pressed the accelerator but it did not respond. The service dealer could not find a problem.

- Antioch, CA, USA

problem #1

May 072005

Prius 4-cyl

  • Automatic transmission
  • 1,368 miles
Consumer was driving about 45 minutes / 65 mph when vehicle lost power/stalled. All warning lights were on. Consumer was able to restart vehicle after it stalled by letting it sit for a while. Vehicle had a history of accelerating and stalling.

- Pasadena, CA, USA

Not what you are looking for?