NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
36 reports89,100 miles · Aug 17, 2026
Engine And Engine Cooling
The contact owns a 2018 Toyota Prius. The contact stated that while having a routine oil change, the contact was made aware that there was no coolant in the coolant reservoir. No warning lights were illuminated. The contact was constantly adding coolant to the coolant reservoir; however, the following day the coolant reservoir w…
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The contact owns a 2018 Toyota Prius. The contact stated that while having a routine oil change, the contact was made aware that there was no coolant in the coolant reservoir. No warning lights were illuminated. The contact was constantly adding coolant to the coolant reservoir; however, the following day the coolant reservoir was empty. The failure had occurred on several different occasions. The vehicle was taken back to the residence. The vehicle was not diagnosed or repaired. The contact researched and was made aware of TSB Number: 013519; however, the VIN was not included. The manufacturer was notified of the failure. The failure mileage was approximately 89,100.
NHTSA ODI #11757394
188,000 miles · Jun 26, 2026
Engine And Engine Cooling
The contact owns a 2018 Toyota Prius. The contact stated that while driving at an undisclosed speed, the engine constantly overheated. An unidentified warning light was flashing on the instrument panel. An independent mechanic inspected the vehicle and became aware that the coolant reservoir was empty. One month later, the same …
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The contact owns a 2018 Toyota Prius. The contact stated that while driving at an undisclosed speed, the engine constantly overheated. An unidentified warning light was flashing on the instrument panel. An independent mechanic inspected the vehicle and became aware that the coolant reservoir was empty. One month later, the same failure reoccurred. A second independent mechanic inspected the vehicle, and the coolant reservoir was empty. The vehicle was taken to a dealer. The dealer diagnosed the vehicle with a coolant leak into the head gasket. The dealer advisor referenced a customer satisfaction program as the cause of the failure; however, the vehicle was over the mileage limit for the program. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 188,000.
NHTSA ODI #11746813
Mileage unknown · Mar 13, 2026
Exterior Lighting
Both taillamps holding moisture. Could cause electrical issues or fire. .. same year and model car have same reported issues and were fixed by manufacturer. This vehicle is the same but different level.
NHTSA ODI #11724219
Mileage unknown · Aug 26, 2025
Electrical System
Driver door lock actuator not working. This seems to be a common problem for Toyota over the last decade, but they yet to put more vehicles to their recall list. Actuator just stopped working. I have to use key out of FOB to manually open. This is a safety issue if I’m trying to get in my car quickly for safety reasons and it do…
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Driver door lock actuator not working. This seems to be a common problem for Toyota over the last decade, but they yet to put more vehicles to their recall list. Actuator just stopped working. I have to use key out of FOB to manually open. This is a safety issue if I’m trying to get in my car quickly for safety reasons and it does not open.
NHTSA ODI #11683274
160,000 miles · Jul 2, 2025
Latches/locks/linkages
The contact owns a 2018 Toyota Prius. The contact stated the trunk opened at a slow speed and failed to remain open. The dealer was contacted and informed of the failure. The dealer informed the contact that the vehicle needed to be taken in to be inspected. The vehicle was not diagnosed or repaired. The manufacturer was informe…
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The contact owns a 2018 Toyota Prius. The contact stated the trunk opened at a slow speed and failed to remain open. The dealer was contacted and informed of the failure. The dealer informed the contact that the vehicle needed to be taken in to be inspected. The vehicle was not diagnosed or repaired. The manufacturer was informed of the failure and confirmed that the VIN was not covered under recall. The manufacturer directed the contact back to the dealer for assistance. The failure mileage was approximately 160,000.
NHTSA ODI #11670706
Mileage unknown · Apr 23, 2025
Visibility
Was driving around 35 mph and my right side mirror blew up. The back blew off and the mirror was shattered and hanging. Nothing hit it. Contacted Toyota and the parts have been on a stop, but there is no recall. It has been 4 months.
NHTSA ODI #11656375
89,682 miles · Mar 26, 2025
EngineEngine And Engine Cooling
The contact owns a 2018 Toyota Prius. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with a failed heat exchanger, catalytic converter, and exhaust system. The contact was informed that the heat exchanger, the cataly…
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The contact owns a 2018 Toyota Prius. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with a failed heat exchanger, catalytic converter, and exhaust system. The contact was informed that the heat exchanger, the catalytic converter, and the exhaust system needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 89,682.
NHTSA ODI #11650717
39,000 miles · Dec 5, 2024
Forward Collision AvoidanceService Brakes, AirVehicle Speed ControlCrash
The contact owns a 2018 Toyota Prius. The contact stated that while in bumper-to-bumper traffic, the vehicle suddenly accelerated. The brake pedal was applied but failed to respond. The driver crashed into the front passenger side of the Lexus. The vehicle continuously moved forward. The contact was eventually able to pull over …
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The contact owns a 2018 Toyota Prius. The contact stated that while in bumper-to-bumper traffic, the vehicle suddenly accelerated. The brake pedal was applied but failed to respond. The driver crashed into the front passenger side of the Lexus. The vehicle continuously moved forward. The contact was eventually able to pull over safely. The pre-collision malfunction warning light illuminated. The brake malfunction light was flashing. The air bags did not deploy. There was no reported fire or injury. A police report was filed. The vehicle was taken to the local dealer, who could not determine the failure. The vehicle was not diagnosed or repaired. The vehicle was then towed to an autobody center where it remained. The manufacturer was contacted, but no additional assistance was provided. The approximate failure mileage was 39,000.
NHTSA ODI #11629049
Mileage unknown · Mar 2, 2024
Air Bags
The Airbag lights were lit, the person sitting with seatbelt on (flashing) and the person sitting with an inflated airbag in front of them. I ran an OBD2 scan on SRS and got code B1656. Driver seat belt buckle Left Hand. I Investigated the latch and found one wire was snapped off and a couple of inches shorter that the wire tha…
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The Airbag lights were lit, the person sitting with seatbelt on (flashing) and the person sitting with an inflated airbag in front of them. I ran an OBD2 scan on SRS and got code B1656. Driver seat belt buckle Left Hand. I Investigated the latch and found one wire was snapped off and a couple of inches shorter that the wire that was still connected. I have included 2 pictures of the back end of the seat belt latch. You can see the broken wire and where it use to be connected.
NHTSA ODI #11575061
Mileage unknown · Oct 31, 2023
SeatsCrashInjury
Someone rear-ended my Prius and they were driving a Ford 250 truck pulling a large flatbed truck that had a huge box on it. My seat went forward and backwards - I slammed my knee under the dashboard and then slammed by head into the headrest and I could not reach the pedals after this. I have repeatedly asked the collision cen…
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Someone rear-ended my Prius and they were driving a Ford 250 truck pulling a large flatbed truck that had a huge box on it. My seat went forward and backwards - I slammed my knee under the dashboard and then slammed by head into the headrest and I could not reach the pedals after this. I have repeatedly asked the collision center to look at it because there is nothing about it on the report of the estimate of repairs. My adult son was a passenger in the front and his seat didn't move.
NHTSA ODI #11552860
NHTSA investigations
1DP22005 · Pedestrian Alert Sounds
Opened Jan 27, 2023 · Closed Aug 7, 2023
Status: closed (inferred from source dates) · Electrical System:propulsion System
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. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.