Total Complaints
18 filings
TOYOTA PRIUS PRIME · model year
18 NHTSA complaints, 6 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2018TOYOTAPRIUS PRIME carries 18 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 6 crashes, 0 fires, 3 injuries, and 0 fatalities. For crash performance, NHTSA's New Car Assessment Program gave this cohort an overall Not Rated/5 rating, with Not Rated/5 front crash, Not Rated/5 side crash, and Not Rated/5 rollover scores derived from standardized barrier and dynamic tests.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2018 PRIUS PRIME is unknown or other with 2 filings, followed by fuel/propulsion system (2) and air bags (2). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 51 investigation files overlapping the 2018 PRIUS PRIME, and 1 remain open. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
18 filings
Crashes Reported
6 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| UNKNOWN OR OTHER | 2 |
| FUEL/PROPULSION SYSTEM | 2 |
| AIR BAGS | 2 |
| ELECTRICAL SYSTEM | 1 |
| ENGINE | 1 |
| EXTERIOR LIGHTING | 1 |
| BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING | 1 |
| BACK OVER PREVENTION: WARNINGS | 1 |
| FORWARD COLLISION AVOIDANCE: WARNINGS | 1 |
| SERVICE BRAKES | 1 |
| POWER TRAIN | 1 |
| STRUCTURE:BODY | 1 |
| VEHICLE SPEED CONTROL | 1 |
| LATCHES/LOCKS/LINKAGES:HOOD:LATCH | 1 |
| VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM | 1 |
Hi, My Prius Prime recently just suffered the loss of heat in the middle of winter. Based on the diagnostic of my local Toyota dealer, it appears one of the metal heater coolant hose had rusted off. This is not just causing a safety issue of having no issue, it is also a risk as the engine can now overheat and suffer permanent damage. Despite being such a serious problem, Toyota doesn't stock the part nor does it know when the new part will come. I am currently owning an asset that can't be safely driven, I would like the NHTSA to review this. Toyota seems to be aware of this issue as they have a TSB out on a similar heater coolant hose. With that said, having no part is not an acceptable option. NHTSA, please step in
As I was driving on a local highway going approximately 50 mph, the hood of the vehicle released and hit the windshield with full force. Luckily there was no traffic on the local highway at the time of the incident. I did not release the hood at all, and the dealer reports verbally to me that the hood latch is damaged. The incident could have resulted in my death if it happened on the highway.
My 2018 Toyota Prius Supreme was parked too far away from the curb in front of a house where we were invited, in a residential area in Naperville IL. I entered the car to park it properly. I had my foot on the brakes and pressed the starting button for the engine to turn on. I then put the car on reverse and suddently the car accelerated uncontollably. Went on the grass, hit the neighbor's mailbox and stopped by crashing on a tree. I was in shock but luckily not injured. Other guests were present and witnessed the incident. Police was called in and issued a report. The car was declared by Progressive Insurance Co as a total loss.
My 2018 Toyota Prius Supreme was parked too far away from the curb in front of a house where we were invited, in a residential area in Naperville IL. I entered the car to park it properly. I had my foot on the brakes and pressed the starting button for the engine to turn on. I then put the car on reverse and suddently the car accelerated uncontollably. Went on the grass, hit the neighbor's mailbox and stopped by crashing on a tree. I was in shock but luckily not injured. Other guests were present and witnessed the incident. Police was called in and issued a report. The car was declared by Progressive Insurance Co as a total loss.
My 2018 Toyota Prius Supreme was parked too far away from the curb in front of a house where we were invited, in a residential area in Naperville IL. I entered the car to park it properly. I had my foot on the brakes and pressed the starting button for the engine to turn on. I then put the car on reverse and suddently the car accelerated uncontollably. Went on the grass, hit the neighbor's mailbox and stopped by crashing on a tree. I was in shock but luckily not injured. Other guests were present and witnessed the incident. Police was called in and issued a report. The car was declared by Progressive Insurance Co as a total loss.
Airbags deployed prematurely as I was parking my car in a doctor's office parking lot. The car was going less than 5 mph and I did not hit anything. The premature deployment of the airbag startled me and caused me to hit the accelerator instead of the brake and I ended up crashing my car into a nearby pole and another .automobile. The accident resulted in a soft tissue injury for my daughter and I'm experiencing lower back pains. The air bag caused burns on my nose and arms. My daughter has bruising on the arms from the air bag deployment
Take foot of break, car accelerates under power. Sooner or later, this is going to result in killing a pedestrian. The question has been for the last year, is this a behavior that can be gotten used to. The answer is definitely NO! This resulted in a near collision with a pedestrian today. Toyota believes the behavior is intentional and will not confirm the safety issue. Farmers Insurance is willing to believe the issue exists without inspection but has no idea what to do. You have a problem on your hands. Biden is trying to transition almost everybody away from gasoline vehicles; thus those that drive manual transmissions will be driving electric vehicles, and their brain patterns have not changed and the procedure for getting rolling from a dead stop will be done the old way, and it's now dangerous. In a manual transmission it is necessary to transition off the break before completing looking all three ways (left, right, straight) because the transition time from break to power i
Air bag did not deploy during a head on collision at 25-30 mph. No warning lamps. Car is totaled according to tow truck driver. Currently at the body shop, waiting for adjusters approval for body shop to take car apart to assess the damage.
The contact owns a 2018 Toyota Prius. The contact stated while driving approximately 5 MPH and in heavy traffic, the contact depressed the brake pedal for traffic but the brakes failed. The contact stated no warning light was illuminated. The contact crashed into the rear end of a truck. The damage was very light due to the low speed. The top of the hood at the front was scratched and the grill also sustained minor scratches. The contact continued on the road. The contact had taken the vehicle to a local dealer, who contacted a manufacturer representative to diagnose the vehicle. The contact was advised that there was no brake failure. The vehicle had not been repaired. The manufacturer had been informed of the failure. The failure mileage was 40,063.
Mileage: 40,063
From the first week of ownership sensors would alarm that they needed cleaning but they were clean. Parking assist sensors also malfunctioning. Also saw Intelligent Clearance Sonar error messages and warnings. Alarm tended to go off in wet weather. Brought to dealership many times and problem occurred infrequently that no problem was ever found. For two years I was plagued by alarms of sensor malfunction. I worried the sensors would fail to detect cars and objects in front of, behind or on the side of the car. That would be a serious failure and cause of an accident. After two years of unsuccessful testing, I traded in the car.
From the first week of ownership sensors would alarm that they needed cleaning but they were clean. Parking assist sensors also malfunctioning. Also saw Intelligent Clearance Sonar error messages and warnings. Alarm tended to go off in wet weather. Brought to dealership many times and problem occurred infrequently that no problem was ever found. For two years I was plagued by alarms of sensor malfunction. I worried the sensors would fail to detect cars and objects in front of, behind or on the side of the car. That would be a serious failure and cause of an accident. After two years of unsuccessful testing, I traded in the car.
From the first week of ownership sensors would alarm that they needed cleaning but they were clean. Parking assist sensors also malfunctioning. Also saw Intelligent Clearance Sonar error messages and warnings. Alarm tended to go off in wet weather. Brought to dealership many times and problem occurred infrequently that no problem was ever found. For two years I was plagued by alarms of sensor malfunction. I worried the sensors would fail to detect cars and objects in front of, behind or on the side of the car. That would be a serious failure and cause of an accident. After two years of unsuccessful testing, I traded in the car.
WHILE DRIVING ON RURAL ROADS WITH NO STREET LIGHTS, THE AUTOMATIC HIGH BEAM SYSTEM MALFUNCTIONS WHEN PASSING ONCOMING TRAFFIC WHO DO NOT DIM THEIR HEADLIGHTS OR WHO HAVE THOSE HEADLIGHTS THAT SHOULD BE ILLEGAL (LIKE FORD). NORMAL LOW-BEAM HEADLIGHTS DO NOT CAUSE THE SYSTEM TO MALFUNCTION. I BELIEVE THIS MALFUNCTION TO BE RELATED TO THE CAMERA SENSOR LOCATED ON THE WINDSHIELD AND WHEN THE GLARE OF THE EXCESSIVELY BRIGHT HEADLIGHTS HIT THAT SENSOR, IT CRASHES THE AUTO SYSTEM. THE SYMBOL ON THE DASH THAT INDICATES THAT THE SYSTEM IS WORKING NORMAL CUTS OFF FOR APPROXIMATELY 25-30 SECONDS, DURING WHICH TIME THE HIGH BEAMS WILL NOT ENGAGE. AFTER THAT 30 SECOND DELAY, THE SYSTEM REBOOTS, THE LIGHT ON THE DASH COMES BACK ON AND THE HIGH BEAMS RE-ENGAGE. THIS IS DANGEROUS AS ALL MANNER OF WILDLIFE CROSS THAT ROAD AT NIGHT AND WITHOUT BRIGHT LIGHTS, MY REACTION TIME IS CUT IN HALF. I HAVE TALKED TO THE TOYOTA DEALERSHIP ABOUT THIS ISSUE SINCE I PURCHASED THIS CAR IN MAY OF 2019 TELLING THEM
Mileage: 15,000
SUPPLEMENT TO COMPLAINT # 11384074 THE VEHICLE HAD THE SAME PROBLEM ON JANUARY 11 AND 12, 2021 AT APPROXIMATELY 7 AM. SPEED WAS 76 MPH, AND THE FUEL DEPRIVATION OCCURRED FOR 8-10 SECONDS EACH TIME. THE VEHICLE HAS NEVER HAD THE PROBLEM GOING HOME AT 2 PM.
Mileage: 39,300
AFTER THE HYBRID BATTERY IS DISCHARGED, AND THE GAS ENGINE KICKS IN, THE VEHICLE LOSES POWER FOR APPROXIMATELY 5-10 SECONDS ON THE FREEWAY. THIS HAS HAPPENED FOUR TIMES, AT APPROXIMATELY 7 AM, ON DECEMBER 1, 10, 14 AND 15. ON ALL OCCASIONS, THE TEMPERATURE WAS BETWEEN 40-45 DEGREES FAHRENHEIT, AND AT HIGHWAY SPEEDS. THE CRUISE CONTROL WAS NOT IN USE. NO WARNING LIGHTS CAME ON. I CALLED THE TOYOTA DEALER ON DECEMBER 1 AND THE SERVICE ADVISER SAID THAT SINCE NO WARNING LIGHTS CAME ON, HE COULD NOT DETERMINE THE PROBLEM. I HAVE A PHOTO SHOWING MY CONTACTING THE TOYOTA DEALER ON DECEMBER 1ST. ON DECEMBER 10, I TOOK THE VEHICLE INTO TOYOTA IN THE AFTERNOON. THE DEALER CHECKED THE VEHICLE AND ROAD TESTED THE VEHICLE WITHOUT HAVING THE HYBRID BATTERY CHARGED, AND THE AIR TEMPERATURE WAS WARMER. I WAS CHARGED $210 FOR THE DIAGNOSTIC SERVICE, ALTHOUGH I HAVE AN EXTENDED WARRANTY. THE SAME PROBLEM OCCURRED ON DECEMBER 14 AND 15. SPECIFIC PROBLEM UNKNOWN BUT I BELIEVE THAT A SWITCH THAT CONTR
Mileage: 20
'HYBRID SYSTEM FAILURE' APPEARED ON DASH DISPLAY DURING A LONG (120 MILE) DRIVE AT HIGHWAY SPEED ON SEPTEMBER 24. AFTER DRIVING ABOUT 40 MILES FURTHER, THE 'CHECK ENGINE LIGHT' CAME ON AND THE DISPLAY SAID TO PULL OVER IMMEDIATELY. AS I PULLED OFF THE FREEWAY, MESSAGES TOLD ME THE POWER STEERING AND POWER BRAKES WERE SHUTTING OFF AND LEFT ME IN FEAR THE CAR WOULD DIE ON THE FREEWAY RAMP BEFORE I COULD PULL OVER. TOWED CAR TO DEALER WHO FIXED A LOOSE CABLE. THIS WEEK (11/10) THE DISPLAY SHOWED THE SAME MESSAGE. THIS IS NOW A RECURRING PROBLEM WITH THIS MODEL.
Mileage: 15,000
'HYBRID SYSTEM FAILURE' APPEARED ON DASH DISPLAY DURING A LONG (120 MILE) DRIVE AT HIGHWAY SPEED ON SEPTEMBER 24. AFTER DRIVING ABOUT 40 MILES FURTHER, THE 'CHECK ENGINE LIGHT' CAME ON AND THE DISPLAY SAID TO PULL OVER IMMEDIATELY. AS I PULLED OFF THE FREEWAY, MESSAGES TOLD ME THE POWER STEERING AND POWER BRAKES WERE SHUTTING OFF AND LEFT ME IN FEAR THE CAR WOULD DIE ON THE FREEWAY RAMP BEFORE I COULD PULL OVER. TOWED CAR TO DEALER WHO FIXED A LOOSE CABLE. THIS WEEK (11/10) THE DISPLAY SHOWED THE SAME MESSAGE. THIS IS NOW A RECURRING PROBLEM WITH THIS MODEL.
Mileage: 15,000
AFTER STARTING FROM A STOP AFTER THE TRAFFIC LIGHT TURNED GREEN, THE CAR IN FRONT OF ME PULLED AHEAD AS THEY ACCELERATED FASTER THAN ME. WHEN THE CAR IN FRONT OF ME WAS ABOUT 50 YARDS IN FRONT OF ME, AND I HAD REACHED ABOUT 25 MILES PER HOUR THE CAR'S COLLISION AVOIDANCE SYSTEM ENGAGED AND SLAMMED ON THE BRAKES AND BROUGHT ME TO A FULL STOP. THE CAR IN FRONT OF ME HAD NOT APPLIED THEIR BRAKES OR SLOWED AT ALL, AND THERE WERE NO VISIBLE OBSTACLES. MY CAR STOPPED SO SUDDENLY THAT I THOUGHT I HAD BEEN HIT FROM THE REAR AT HIGH SPEED UNTIL THE RED WARNING LIGHTS APPEARED ON THE DASH (AFTER THE BRAKING STARTED). THE CARS BEHIND ME ALMOST RAN INTO ME BECAUSE OF THE SUDDEN STOP.
Mileage: 22,500
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.