Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
47,200 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

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2004 Toyota Prius:

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

2004 Toyota Prius Owner Comments

problem #3

May 302010


  • 50,000 miles


My 2004 Toyota Prius has left me stranded for 15 minute periods of time while parked on my street. All the dashboard lights come on as well as the following red warning "caution - transmission "P" lock mechanism is abnormal. Park in a flat place and apply brake." I was parked on a mild incline and I always use my parking brake. This however makes me suspicious of whether the parking brake is hardy enough to work when parked on the crown of a street parking space. I applied and re-applied my parking brake without success. I open and closed the hood without success. I open and closed my door without success. I placed all my passenger seat items on the floor without success. I held the ignition button without success. I placed my key fob into the ignition without success. And when trying to remove my key fob so I could go call a tow truck, the entire dashboard housing for the ignition key came loose and dis-articulated in my hand. I just carefully pushed the plastic housing back into the dashboard.... however, that was depressing to see. Finally, after all the tinkering for 15 minutes, my car finally turned off. I was then able to turn it back on and drive away without a problem. In retrospect, this has happened on at least 4 occasions since December 24, 2009 and I just assumed that during the bout with my injured leg that I was not adequately placing enough force on the parking brake..... but should this happen so easily?? I have seen many other similar complaints online. I would like to know if this is part of the whole safety issues with cars not being able to stop while running. Thanks.

- Arlington, VA, USA

problem #2

Nov 082009


  • 83,000 miles
Repeated braking at slow speeds resulted in both ABS and brake on signals, owner's manual says stop driving and contact dealer immediately. Drove slowly to dealer who ran diagnostics.($98)told to replace computer ($2000) not in stock. Told ok to drive until replacement. Adjusted something. Warning lights operated as expected. Situation recurred twice. Owner's manual indicated knowledge of possible failure. Also "parking brake abnormal status has appeared twice. No explanation in manual

- Philadelphia, PA, USA

problem #1

Jan 222005

Prius 4-cyl

  • Automatic transmission
  • 8,600 miles
The consumer started the vehicle and noticed that the steering was very difficult. After driving for two blocks, the dash light had come on and the steering had become easier. The general warning symbol had come on, which meant the vehicle needed to be taken to the dealer. The brake light had been continuously on. When the emergency brakes were applied, the vehicle did not behave as if it were activated. The ignition relay was replaced per warning light.

- Ithaca, NY, USA

Not what you are looking for?