hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
49,005 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.

2004 Toyota Prius brakes problems

brakes problem

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2004 Toyota Prius Owner Comments

problem #4

Jan 112011

Prius 4-cyl

  • 102,020 miles


Traction control disables car when slippery... engine totally shuts off. Can happen passing through an intersection when icy/snowy, etc. Also makes ascending hills nearly impossible.

- Athens, GA, USA

problem #3

Dec 192010


  • 93,000 miles
1. events leading to failure driving in 1 - 2 inches of snow, I attempted left turn, encountering a somewhat deeper (approximately 4-inch, and heavily tracked from previous vehicles) berm of snow at the entrance of the side street onto which I was turning. 2. the failure, how often it occurs, its consequences the traction control seized all motion of front (traction) tires, though snow was not deep enough otherwise to prevent movement. This left me in the path of oncoming traffic approaching downhill on slippery road. The traction control completely disabled car, leading to very dangerous situation. Also, continued application of accelerator pedal to get the car to move quickly created smell of hot transmission. There is no question that, even with the open differential, the car would have progressed through the snow but for the traction control. And, of course, there is no question that this problem is inherent to the traction control system and would occur whenever conditions occur that cross the threshold of slipperiness and resistance I encountered. 3. the defect remains uncorrected. The essential correction is redesign and replacement of the traction and/or adding a disabling switch.

- Salt Lake City, UT, USA

problem #2

Feb 122010


  • miles
Returning from work approx 1700 driving my 2004 Toyota Prius in the greater Washington D.C. metro area. It was the first day of federal government office openings since the blizzard of 2010 had started. My residence is approximately 1.5 miles from a major primary road (va hwy 7 in loudoun county). The road is secondary state road vadot owned and maintained dirt (packed gravel) road for approximately 1.25 miles, proceeding into our my development the road is paved asphalt fro the remaining.25 miles. On the secondary road the conditions of the road was packed snow with small runs of loose snow. The road is very winding with slight inclines and declines throughout. Every time my car would break traction I would lose power leaving me with no correction capability to maintain control over the vehicle. I almost ran into embankments and over the soft shoulder several times despite slowing down to a crawl. Once entering into the neighborhood the car seemed to stable out until I began driving on an uphill portion of the road. This is a stepper hill than on the secondary road. When my tires broke traction all power from the car was lost leaving me in an uncontrolled situation of sliding around on the road eventually into the soft shoulder of a downhill cliff. I was attempted to start moving forward get myself away from the shoulder and the car would not move or put any sort of power to the wheels. I was terrified and stuck. I made several attempts finding new lines (paths) finally reaching the top of the hill (my driveway) due to the removal of car power. This has continued to happen un suspecting throughout the month on the unpaved roads placing me in danger. I am scared to drive it in any winter condition. It appears this is well documented on Consumer Affairs website and I have no way to correct this except sell my car.

- Round Hill, VA, USA

problem #1

Jan 102005


  • 1,000 miles
The contact owns a 2004 Toyota Prius. The contact was driving approximately 25 mph on a road covered with three inches of snow. The vehicle began began to skid. The skid control warning indicator illuminated on the instrument panel. The traction control system activated and caused the engine to become inoperative. The failure occurred during activation of the traction control system. The vehicle was taken to an authorized dealer. The technician stated that was a manufacturer design. The failure mileage was 1,000.

- Moretown, VT, USA

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