Most common 2004 Toyota Prius problems
Share of the 610 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Toyota Prius complaints by model year
Best Prius years: 2021, 2020, 2018. Years to avoid: 2011, 2010, 2007, 2006, 2008. Compare all years →
2004 Toyota Prius recalls (6)
Hybrid propulsion system › Inverter
Toyota is recalling certain model year 2004-2009 Prius vehicles manufactured August 6, 2003, through March 30, 2009 and FCHV-adv vehicles manufactured December 12, 2008, through September 13, 2011. During manufacturing, a scratch may have occurred inside of the electrically driven water pump at the coil wire.
Remedy: Toyota will notify its owners, and dealers will replace the electric water pump, free of charge. The recall began on January 17, 2013.
Steering › Gear box › Shaft sector
Toyota is recalling certain model year 2004-2009 Prius vehicles manufactured August 5, 2003, through March 30, 2009. The affected vehicles have a steering intermediate extension shaft assembly built with metal splines that complete the connection from the steering wheel to the steering gear.
Remedy: Toyota will notify owners, and dealers will inspect the extension shaft and replace it if it is one with insufficient hardness, free of charge. The recall began during December 2012.
Vehicle speed control › Accelerator pedal
Toyota is recalling certain model year 2004-2010 passenger vehicles. The accelerator pedal can get stuck in the wide open position due to its being trapped by an unsecured or incompatible driver's floor mat.
Remedy: Toyota filed an amended defect report on November 25, 2009, stating that dealers will modify the accelerator pedal and, on certain vehicles, alter the shape of the floor surface under the pedal.
Steering › Electric power assist system
The intermediate shaft and sliding yoke in the electric power steering system can crack when large forces are applied and the connection May separate or the sleeve May fracture.
Remedy: Toyota will replace the steering intermediate shaft and inspect the sliding yoke and replace it if necessary. The recall began on June 9, 2006. Owners May contact Toyota at 1-800-331-4331.
Air bags
On certain vehicles, due to improper assembly of the air bag inflator, which is used in the side air bag, the curtain shield air bag, and the knee air bag assembly, some inflators were produced with an insufficient amount of the heating agents necessary for proper air bag deployment.
Remedy: Dealers will replace the specific SRS air bag. The recall began on April 6, 2006. Owners May contact Toyota at 1-888-270-9371, Scion at 1-866-548-1851, or Lexus at 1-800-255-3987.
Exterior lighting › Brake lights › Switch
Certain passenger vehicles May be equipped with an improperly designed brake light switch. A silicon oxide build-up occurs on the contacts inside the brake light switch, which can make it inoperable.
Remedy: Dealers will replace the brake light switch. The recall began during December 2004. Owners should contact Toyota at 1-800-331-4331.
NHTSA defect investigations
Federal safety investigators have looked into 3 possible defects involving the 2004 Toyota Prius:
Engine stalling
Odi opened pe05-029 based on 33 reports of alleged gasoline engine stalling on the subject vehicles.the subject vehicles are gasoline/ electric hybrid vehicles that can be operated in gasoline or electric modes, or a combination of both depending on the power demand.all reports allege that the gasoline engine shut down suddenly without warning.some of the complainants reported that the vehicle continued to operate…
Pedestrian alert sounds
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles.
Intermediate Steering Shaft Separation
The Office of Defects Investigation (ODI) received a January 2013 defect petition requesting that it open an investigation on Model Year (MY) 2004-2009 Toyota Prius vehicles to address a possible manufacturing safety defect related to the steering column intermediate shaft.During the defect petition evaluation, ODI: 1.Reviewed the petition and its enclosures; 2.Reviewed the subject steering system layout; 3.Examined…
What 2004 Toyota Prius owners say
Lights all 184 →
About 1.5 years ago during a vacation. My car decided to not shut off. I drove to the nearest dealership that was about the close. They assisted and said to hold the power button down until it shuts off then turn it back on. This was a dealership in georgia. The mechanic had heard of the problem before. I recently had the front dash light go completely out. I did not have an instrument panel at all. The was not a way to see MPH, gas gauge, warning lights, nothing. The center monitor stayed on. It took 2 days but it came back on. A week later it happened again and again came back on. Warning lights came on and I drove to dealership. It was the 2nd water pump going out. As I was leaving my dash lights went out again. I took it back into the Prius dealership. They had paperwork stating there had been issues with the metered dash before. Is there a recall on it or not? …
Speedometer & other control information display went blank. Pulled over to side of road but unable to turn off engine. Contacted Toyota & was told problem is known & warranty extend to 9 years & unlimited miles. However, my vehicle is older than nine years, so I must pay estimate $1400 to fix & car will be unavailable for estimate 2 weeks. The vehicle is unsafe to drive, prior to this known problem occurring car was operating perfectly ( averaging 50 mpg per tank of gas, documented). This appears to be a safety problem that was known by the manufacturer, however they seems to be trying to hide this by making the statistical estimate that by extending the warranty the majority of these cars would be off the road and their lawyers & legal insurance would cost less than the few humans kills after this arbitrary 9 year risk period. I could have been killed as a result of this failure! …
Electrical system all 177 →
The contact owns a 2004 Toyota Prius. The contact stated while driving approximately 30 MPH, the vehicle stalled. The vehicle lost power steering functionality but the contact was able to safely pull off of the road. The contact stated that the check engine warning light and other unknown warning lights were illuminated before the vehicle stalled. Additionally, the instrument panel went black. The contact stated that she attempted to restart the vehicle but the vehicle would not restart. The contact had the vehicle towed to her residence and later towed to an independent mechanic. The vehicle was diagnosed and it was determined that a wiring cable connector had melted onto the battery and affected the engine. Additionally, the fuel pump needed to be replaced. The vehicle was repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 83,200.
During a hot period of summer, my drive selector decided to not stay in the drive position unless I held it there. I could make the initial selection of drive and then stop on the gas, but it would not stay unless I physically held the lever down in the drive position. I never had an issue with the reverse position; only drive. I could always get the car back into Park. This is an extremely unsafe driving condition because it happens without warning and the fix is not obvious. Once the driver is aware of the fix, it forces them into an unsafe driving condition: driving with one hand on the parking selector. Once cooler weather came, the issue went away. It didn't happen on all hot days and was intermittent. I replaced the drive selector in 2022 and have only had the issue come up one other time since replacing this part.
Engine & cooling all 98 →
The contact owns a 2004 Toyota Prius. The contact stated while driving approximately 30 MPH, the vehicle stalled. The vehicle lost power steering functionality but the contact was able to safely pull off of the road. The contact stated that the check engine warning light and other unknown warning lights were illuminated before the vehicle stalled. Additionally, the instrument panel went black. The contact stated that she attempted to restart the vehicle but the vehicle would not restart. The contact had the vehicle towed to her residence and later towed to an independent mechanic. The vehicle was diagnosed and it was determined that a wiring cable connector had melted onto the battery and affected the engine. Additionally, the fuel pump needed to be replaced. The vehicle was repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 83,200.
This occurred to me yesterday while traveling 60 MPH in 94 f heat on I-76 e just before the 676 / 76 split. I was traveling in the far left lane when the car suddenly lost power. Looking at the dash I noticed the shifter had moved itself into n (neutral), it would not move back into drive. I applied my hazard lights and began forced my way rightward across three lanes to the shoulder, speed rapidly decreasing and seemingly more sluggishly than a normal coast. I think the emergency brake was automatically being applied or I was fighting a braking system. One lane from the shoulder, a ups truck was headed for me from behind. Luckily, he was able to swerve into the shoulder and pass me there as he could not move left into other traffic. We only narrowly avoided a collision with me or the elevated barrier on the side of the road. I had only 10 MPH left and no ability to redirect my vehicle. …
2004 Toyota Prius engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 1.5L 4-cyl hybrid | CVT | FWD | 48 / 45 / 46 |
EPA ratings. Class: Midsize car.
Frequently asked questions
Is the 2004 Toyota Prius a good car?
Based on 610 owner complaints filed with NHTSA, the 2004 Prius rates avoid: 2.2× as many complaints as a typical year of the Prius at the same age. It is one of the Prius years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2004 Toyota Prius?
The lights — 184 complaints, 30% of all complaints for this model year, most often about headlights. Next are the electrical system (177) and engine & cooling (98).
How many recalls does the 2004 Toyota Prius have?
There are 6 recalls for the 2004 Toyota Prius, the most recent from November 14, 2012 (inverter). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Toyota Prius?
The best years by complaints, compared at the same age, are 2021, 2020 and 2018. Years to avoid or approach with caution: 2011, 2010, 2007, 2006 and 2008. See the full Toyota Prius years comparison.
At what mileage do 2004 Toyota Prius problems happen?
The median mileage reported in complaints is about 72,000 miles; 41% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.