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Other or unknownPart report

2004 Toyota Prius Other or unknown Problems

Complaints
18about this part
Share
3%of 610 total for the year
Median mileage
50,618miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 18 complaints about the other or unknown of the 2004 Toyota Prius, 3% of the 610 complaints for this model year. Where a mileage was given, the median is 50,618 miles. 1 of these say a crash was involved, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“All the instrument cluster lights continue to go out on my 04 Prius. I don't know how much fuel I have this could be a safety issue. I don't know how fast I'm going this could definitely be a safety issue. And zero warning lights come on this is definitely a safety issue. By looking on the internet I can tell thousands of priuses have this exact same issue with the instrument panel cluster going out. This should definitely be a recall.”

NHTSA complaint #11373705, filed 2020-11, 160,000 miles

“My Prius suddenly had a 70 to80% loss of brake power. My parking brake light came on along with the ABS, vcs, the red triangle and a load buzzer. If this had happened at highway speed I could have rear-ended or killed someone. After turning my car off and letting it sit the lights stayed off. This concerns me because it could lead to a false sense there's nothing wrong. I took my car to the dealer and they seemed to know right away it was the ABS brake actuator code c1256. I did some digging and it seems this is a very common problem and yet it's not a recall issue. …”

NHTSA complaint #11082096, filed 2018-03, 72,436 miles

“I was driving my 2004 Toyota Prius on the highway there were 5 passengers in the car including me. Suddenly there was a loud alarm in the car. It was a loud beep. The breaks completely failed. When I stepped on the breaks they did not react. I was going 65 miles an hour on the highway and thankfully we were not going down hill. I used the engine brake and pressed really hard on the breaks to bring the car to a stop on an off-ramp. Since I weight 300 pounds I could put all my weight into the brakes and finally brought it to a stop. If my wife was driving we would have crashed. …”

NHTSA complaint #11115868, filed 2018-08, 147,000 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. …”

NHTSA complaint #10371766, filed 2010-12, 93,000 miles

“I had just dropped my son off at school when all of the warning lights on the dash and multi display of my 2004 Toyota Prius illuminated. As soon as I pulled the car out of the school driveway and onto the highway (speed limit 45 MPH), I realized that I had no acceleration. I managed to pull the car onto a side street before it shut down completely. Police had to divert traffic while awaiting the tow truck. At the dealership, the car started up again. The dealer couldn't determine the problem, and tried reprogramming the car. …”

NHTSA complaint #10121180, filed 2005-05, 6,000 miles

Related service bulletins

Other or unknown: other model years

YearComplaintsShare of year
2025319%
2024933%
2023314%
2022521%
2021117%
2020536%
2019827%
2018616%
20171112%
20163120%
2015159%
20142713%
20135112%
2012338%
2011306%
20101485%
2009367%
2008926%
20071055%
2006443%
2005565%
2004183%
200333%
200253%
200164%

Other parts of the 2004 Toyota Prius

Exterior lighting
184 complaints
Electrical system
177 complaints
Engine cooling
89 complaints
Brakes
76 complaints
Vehicle speed control
52 complaints
Transmission and drivetrain
34 complaints
Air bags
18 complaints
Fuel system
13 complaints
Steering
10 complaints
Visibility (wipers, defrost, mirrors)
10 complaints
Engine
9 complaints
Electronic stability control
8 complaints

← All problems reported for the 2004 Toyota Prius

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology