420 of the
15,583 complaints filed about the Toyota Prius
are about the transmission —
3% of everything owners reported.
The worst model year for it is 2010.
420
Complaints
3%
Share of all complaints
40
Crashes
3
Fires
Transmission & Drivetrain complaints by model year
The contact owns a 2023 Toyota Prius. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that the vehicle lost motive power. No warning lights were illuminated. The vehicle was driven to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The failure was a persistent failure. The contact stated that the vehicle was unsafe to drive. The manufacturer was not made aware of the failure. The failure mileage was approximately 35,050.
NHTSA complaint #11756918 — an unverified report by a vehicle owner.
I am submitting this complaint to report an unexpected transmission shift event that occurred while operating my 2025 Toyota Prius at highway speed which created an immediate and obvious safety risk. The event occurred on XXX. While driving my Prius at approximately 75mph on Interstate [XXX], I reached toward the center console area to retrieve my sunglasses. I did not intentionally move the shifter, but the transmission suddenly shifted from Drive to Neutral. After moving from Drive to Neutral, the accelerator no longer provided propulsion. At the time, my vehicle was traveling downhill and was being followed by an eighteen-wheel tractor trailer. The truck driver behind me had no way of knowing that my vehicle had unexpectedly lost the ability to accelerate. To avoid being struck from behind, I steered left into a paved median area, applied the brakes, and was able to shift back to Drive and merge into the traffic flow. Had a paved escape area not been available, it seems inevitable that our chances of being in a fatal collision with the vehicle behind us would be quite high. My concern is that a normal driver movement (reaching for an item near the center console while driving) may inadvertently have caused the transmission to enter Neutral at highway speed resulting in the possibility of serious harm or fatality. I believe this presents an unacceptable safety hazard and warrants investigation. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11742143 — an unverified report by a vehicle owner.
I was driving my car and suddenly the traction , hand brake and ABS sign started showing up. I usually apply only 10% of force on brake pedal but after this I have to apply almost 60% of force to even slow down the car. Almost 90% force to stop the car It has threatened safety of my family. When diagnosed at autozone they told cannot determine error code. When reading in internet this seems to be common problem in prius. Please help is fixing the issue as it is not at my fault. This seems to be manufacturing defect.
NHTSA complaint #11734183 — an unverified report by a vehicle owner.
My Prius suddenly malfunctions and goes berserk randomly. No other way to describe it. I've taken it into the dealer twice, and I'm not confident I'm driving a safe car. I've not done anything to the car and it has not been in an accident. It's unclear why it does it. When it has an episode it is not safe to drive, won't turn on and won't turn off. The alarm goes crazy. Nothing works, all the dash lights turn on. I have videos. This has happened about five times and I've been called back from the dealer to pick it up. I"m not confident it is safe to drive, and I don't think Toyota is taking my concerns seriously. The vehicle has about 7400 miles and is otherwise pristine. All service is up to date. It is a lease.
NHTSA complaint #11708925 — an unverified report by a vehicle owner.
Entering the highway the car suddenly learched and stopped excelerating, creating an unsafe situation, and went into a slow mode. It limped along. Caused cars issue around having to slow merge and driving only 10-15 miles per hour. The dealer could find no codes and said it could be an air bubble in fluid line??? No warning lights.
NHTSA complaint #11690445 — an unverified report by a vehicle owner.
Randomly, the car have a delay of approximately 2 seconds when I hit the gas pedal. It happened multiple times, 2-3 times per day. The gas pedal can pe pressed to the floor, it won’t react. After 2 seconds or so it will react and drive normally. I noticed this is happening when the car is in EV mode ( I’m either stopped at red light, or I’m slowing down a bit/taking a turn. This is a hazardous situation and very dangerous.
NHTSA complaint #11685015 — an unverified report by a vehicle owner.
The contact owns a 2010 Toyota Prius. The contact stated while driving 45 MPH downhill on a mountain and depressing the accelerator pedal, the pedal travelled down to the floorboard, but the vehicle failed to accelerate as intended. The contact pulled over to the side of the road. The contact stated that upon turning off and restarting the vehicle several times, the vehicle responded as needed. The contact stated that the failure recurred after making a turn at 3-4 MPH downhill. The vehicle was not diagnosed or repaired. The dealer and the manufacturer were notified of the failure. The failure mileage was 194,000.
NHTSA complaint #11675989 — an unverified report by a vehicle owner.
Exhaust heat-exchanger coolant pipe (part of the hybrid cooling loop) on my 2019 Toyota Prius is the system that failed. Safety risk: complete loss of coolant can cause sudden engine overheating and possible power reduction or shutdown while the vehicle is moving. I transport two young children daily; an unexpected stall on a highway or during an intersection turn would put all occupants and surrounding traffic at risk. AutoNation Toyota Mall of Georgia (dealer) inspected the car on 22-May-2025, confirmed the leak, and advised the vehicle is unsafe to drive until the pipe is replaced. Repair estimate is $2,249 parts & labor to replace the front exhaust pipe that is on back order, no ETA. Toyota Corporate (Brand Engagement, Case # 250522002498) is aware; they escalated the file to their Parts Department because the replacement pipe is back-ordered with no estimated arrival date. No other agencies or insurers have inspected the vehicle. Two days before the dealer visit, the warning symbol began flashing briefly at breaking then for longer intervals while driving. On the morning of 22-May-2025 the lamp was flashing more often and longer prompting the service appointment. Dealer found the coolant reservoir completely empty. No prior warning messages had appeared.
NHTSA complaint #11663559 — an unverified report by a vehicle owner.
While driving through the mountains, the ABS, Brake, and Slippery (traction control) warning lights all suddenly illuminated on the dashboard. This happened without any noticeable trigger, and the warning lights remained on for the duration of the drive. I'm concerned about potential issues with the braking or stability systems and request a diagnostic check to ensure everything is functioning properly. Also I am aware that there was recall on Prius 2010 related to ABS system. My VIN was not included in that but seems like similar issue
NHTSA complaint #11654656 — an unverified report by a vehicle owner.
I am writing to bring attention to a critical safety issue affecting the 2012 Toyota Prius and other Toyota models equipped with the brake booster and actuator system. These components are failing at alarming rates, leaving vehicles with no functional brakes, ABS, or traction control. Additionally, this failure compromises the hybrid system due to the regenerative braking no longer working, potentially causing further damage to hybrid components and resulting in repairs costing several thousand dollars. Toyota issued Customer Support Program ZJB, which covered these issues for a limited period. This program was in effect from August 31, 2021, with no mileage or year restrictions, but offered secondary coverage for up to 10 years or 150,000 miles from the vehicle’s first use. Unfortunately, my vehicle, with approximately 130,000 miles and 12 years of age, was denied coverage when brought to a dealer after the program had ended. Despite the brake booster and actuator failing, the dealership did not advise me not to drive the vehicle, further emphasizing the gravity of this oversight. This is a significant safety hazard, as vehicles with these failures lack the ability to stop effectively, risking lives on the road. Furthermore, this problem is not isolated to my Prius; it affects thousands of Toyota vehicles equipped with these components. The estimated repair cost exceeds $3,000, an undue burden on owners for an issue that stems from defective manufacturing. I firmly believe Toyota’s decision to address this problem through a limited Customer Support Program, rather than a full recall, is inadequate and irresponsible. This issue meets the criteria for a safety recall and should be treated as such by the National Highway Traffic Safety Administration (NHTSA). I respectfully urge the NHTSA to investigate this matter further asap/mandate a recall for all affected vehicles. This is a big safety issue. [XXX] [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)
NHTSA complaint #11637477 — an unverified report by a vehicle owner.
My car suddenly stopped in the middle of the road with message "Hybrid system stopped steering power low". Safety concern to this happen on the middle of road during rain or cold.
NHTSA complaint #11636396 — an unverified report by a vehicle owner.
The contact owns a 2017 Toyota Prius. The contact stated while the contact's wife was driving at an undisclosed speed, the accelerator pedal was depressed. The accelerator pedal was depressed, however the vehicle failed to accelerate as intended. The contact stated that the vehicle stalled and jerked. The vehicle was driven to the residence. The contact stated that the battery indicator did not look as if the battery was charging. The contact stated that the vehicle was taken to two independent mechanics; however, the failure was not duplicated. In addition, the vehicle was taken to the dealer; however, the failure was not duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The contact stated that the failure had become persistent. The contact stated that during one failure his wife was driving, and the vehicle lost motive power and stalled. The vehicle failed to restart. The vehicle was towed to an independent mechanic however, the failure was not duplicated. In addition, the contact stated that during one failure, the excessive acceleration warning light illuminated. The contact had not depressed the accelerator pedal during the failure. The manufacturer was made aware of the failure and a case was filed. The contact was informed that no assistance was available. The failure mileage was approximately 68,000.
NHTSA complaint #11627707 — an unverified report by a vehicle owner.
The contact owns a 2023 Toyota Prius. The contact stated that while sitting in traffic with the brake pedal depressed, the vehicle started rolling backward even though the gear shifter was in drive(D). The contact stated that upon attempting to accelerate, the vehicle failed to respond and continued to roll backward. The contact stated that after turning off and restarting the vehicle, the vehicle responded as needed. There was no warning light illuminated. The vehicle was not diagnosed or repaired by a dealer or an independent mechanic. The manufacturer was not notified of the failure. The failure mileage was unknown.
NHTSA complaint #11606733 — an unverified report by a vehicle owner.
In temperatures above 95 degrees the vehicle shifts into neutral while driving, and you need to physically hold the shift lever in Drive or Reverse to keep it out of neutral. It won't go into park at all unless you restart. This could cause a fatal accident while driving, particularly on the freeway. It has not yet been confirmed since it only happens at very high temperatures, which is rare where I live (Seattle). There has been quite a lot of discussion on Reddit and other internet sites about this problem with Priuses, particularly the 2008 model. I have an appointment with my mechanic to replace the shift lever assembly, which appears to be the most commonly referenced fix. There are no warning lights, other messages, or symptoms before or while this is happening. The problem resolves when the air temperature goes back down.
NHTSA complaint #11600626 — an unverified report by a vehicle owner.
During summer months when temperatures are above 100 degrees when accelerating from a complete stop I can hear the engine rev and the RPMs increase but the vehicle will move at 1-2 mph. Even if the accelerator is to the floor. After 3-4 seconds the tires will squeal and the vehicle will be jolted forward then it will slowly accelerate. This happens occasionally and I have taken it to a Toyota dealership and a chain mechanic shop, neither have been able to recreate the problem. There are no warnings and no error codes. I have been stuck in the middle of intersections trying to turn left, I have not been hit, but I fear it will happen. There is a recall out for this issue on other Priuses and I believe the issue needs to be investigated further as there is another complaint on this site for the same issue and I have found it on other sites. I bought the car in fall of 2019 and this problem has been occurring since summer of 2020.
NHTSA complaint #11600638 — an unverified report by a vehicle owner.
I keep replacing P1116 and it keeps coming back also I was driving up a hill when I lost power and the car wouldn't accelerate. It would turn on and go into gear but not go anywhere. I know it says my vin doesn't have recalls but why am I experiencing them
NHTSA complaint #11566087 — an unverified report by a vehicle owner.
The contact owns a 2008 Toyota Prius. The contact stated while driving approximately 65 MPH, she heard a beeping sound, and the instrument cluster flashed the parking brake and a triangle symbol with an exclamation point was illuminated. The contact stated that the "Failure with Transmission - Pull Over and Shift to Park(P)” message was displayed. The contact stated that the shift indicator on the instrument cluster showed that the vehicle was shifted into park(P). The contact stated that the vehicle made an abnormal grinding sound and started losing motive power. The contact stated that the engine was still running however, the vehicle lost power steering and braking functionality. The contact stated that when she depressed the accelerator pedal the vehicle failed to respond. The contact pulled off the roadway and turned off and restarted the vehicle and the vehicle regained normal functionality; however, after driving for ten miles, the failure recurred. The contact drove the vehicle back to the residence and turned off and restarted the vehicle several times. The contact had not taken the vehicle to a local dealer or independent mechanic. The vehicle had not been diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 130,000.
NHTSA complaint #11540412 — an unverified report by a vehicle owner.
"Cooling Performance of the Hybrid Battery is Low" warning light turns on every 4-5 months on my 2013 Toyota Prius. Apparently, Toyota issued a bulletin to Toyota Service Departments re: Engine/Hybrid System Section Hybrid/Battery Control System Market USA. This info was never disclosed and is costly to repair every 4-5 months due to excessive buildup of dust, lint, or debris in the HV battery intake filter or cooling fan. When it first went off in June 2022 my vehicle was still under warranty up to the two additional repairs in December 2022 and May 2023 (for which the Toyota Dealership repair department didn't provide me a ticket either time but made the repair), and again now (August 2023). This is an issue that could cause the battery to fail while driving. Additionally, this issue is highly inconvenient, expensive and highly concerning. This ongoing issue affects the safety and value of my car if this issue must be repaired every 4-5 months or "every 5,000 miles). This information was never made public to Prius owners I don't believe as I never received notice. I would've sold my car sooner had i known. Here is the Toyota DOcument I received on 8.21.23 from Marina Del Rey Toyota T-SB-0062-20 dated June 18, 2020
NHTSA complaint #11540127 — an unverified report by a vehicle owner.
The contact owns a 2013 Toyota Prius. The contact stated that while attempting to shift to drive(D), the transmission failed to shift as needed. The vehicle was towed to the dealer, who informed the contact that a hose had detached from the valve. The manufacturer was not made aware of the failure. The failure mileage was 167,000.
NHTSA complaint #11526795 — an unverified report by a vehicle owner.