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2018 Toyota Prius Owner Complaints

Updated May 30, 2026
Ethan Miller
2018 Toyota Prius Owner Complaints

Complaint Summary

The 2018 Toyota Prius has 43 reported complaints.

  • Top issues involve unknown or other and visibility/wiper.

Reliability Score

Reliability Score

8.7/ 10

Based on 43 complaints

Most Frequent Issues

UNKNOWN OR OTHER

5 11.6%

VISIBILITY/WIPER

5 11.6%

VEHICLE SPEED CONTROL

4 9.3%

EXTERIOR LIGHTING

4 9.3%

SERVICE BRAKES

3 7%

Quick Insights

  • The top category is UNKNOWN OR OTHER, accounting for 11.6% of all complaints.

  • Owners have reported issues across 18 distinct vehicle systems.

  • Note: Complaint data reflects owner reports and may not always indicate a verified defect. Compare with Recalls and TSBs for a complete picture.

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Complaint Summary

What owners keep reporting on the 2018 Toyota Prius

The 2018 Toyota Prius has 43 owner complaints in this dataset. UNKNOWN OR OTHER is the most common complaint category, representing about 12% of the reports shown here.

Most common complaint categories

The top complaint groups for the 2018 Toyota Prius are UNKNOWN OR OTHER (5), VISIBILITY/WIPER (5), VEHICLE SPEED CONTROL (4).

Are these complaints a serious red flag?

Potentially. 14 complaint reports involve higher-attention systems like brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection.

What should buyers inspect on a used 2018 Toyota Prius?

Start with the top complaint systems, compare them against the recall report, then inspect service records for evidence that those same areas were already repaired or monitored.

Read the full buyer guideRecall report and remedy notesMaintenance costs and intervals2017 Prius complaints2019 Prius complaints2020 Prius complaints

Detailed Complaint Log

Showing 18 of 18 systems

UNKNOWN OR OTHER

5 Reports12% of total

Previewing the first 2 complaint summaries.

THE GEAR WOULD SHIFT EITHER FROM 'DRIVE TO NEUTRAL' OR 'REVERSE TO NEUTRAL' THIS HAPPENED MORE THAN 10 TIMES WHEN I HAD MY SISTER, MOTHER, AND FATHER IN THE CAR. 1) IT HAPPENED WHEN I WAS PULLING OUT OF THE GARAGE (ABOUT 20 DEGREE ANGEL) GOING UP THE HILL. I WENT TO PICK THEM UP, ALL 3 PF THEM WENT IN. I HAD MY FOOT ON THE BRAKE AND GEAR ON DRIVE, WHEN I LET GO OF THE BRAKE THE GEAR SHIFTED AUTOMATICALLY ON NEUTRAL. AFTER, 3 TRIES, THE CAR FINALLY WAS ABLE TO GO FORWARD WITHOUT STRUGGLE. 2) I WAS TRYING TO BACK IN ONE OF THE SPOT (FLAT GROUND), FOOT ON THE BRAKE, GEAR ON REVERSED. WHEN I LET GO OF THE BRAKE THE GEAR SHIFTED TO NEUTRAL AUTOMATICALLY. I STRUGGLED FOR 3-4 TIMES BEFORE THE WAS ABLE TO HOLD ON REVERSED AND PARK THE CAR SAFELY. 3) WHEN I WAS IN THE MIDDLE OF THE INTERSECTION (FLAT GROUND). I HAD MY FOOT ON THE BRAKE, WHEN I FINALLY WAS ABLE TO MAKE A TURN, MY FOOT ON THE FOOT AND GEAR ON DRIVE, WHEN I LET GO OF THE BRAKE THE GEAR SHIFTED TO NEUTRAL OF THE THE SUDDEN, I HAD TO TRY 3-4 TIMES BEFORE IT WAS ABLE TO MOVE FORWARD WITHOUT A STRUGGLE 5) I WAS ON A HILL (ABOUT 20-30 DEGREE ANGLE) FACING UP. MY FOOT WAS ON THE BRAKE AND GEAR ON DRIVE, WHEN I LET GO OF THE BRAKE THE GEAR WAS SHIFTED TO NEUTRAL. I STRUGGLED FOR 5-10 MINUTES (GOING FROM DRIVE TO NEUTRAL BACK IN FORTH) AS MY CAR WAS NOT ABLE TO HOLD DRIVE MODE, I EVENTUALLY ASKED MY FAMILY TO GET OUT OF THE CAR AS I WAS GETTING WORRIED AND FRUSTRATED, MY FAMILY WAS OUT OF THE CAR BUT I WAS STILL STRUGGLING, IN THE PROCESS I HIT A CAR BEHIND ME. 6) I WAS FINALLY ABLE TO PARK THE CAR IN WITH ANY PASSENGERS AND SOMEWHERE FLAT GROUND. I LEFT MY CAR FOR 30 MINUTES AND CAME TO DRIVE MY CAR. I STARTED MY CAR, I HAD MY FOOT ON THE BRAKE AND GEAR ON DRIVE. I LET GO OF THE BRAKE THEN MY GEAR SHIFTED TO NEUTRAL AGAIN, I STRUGGLED FOR 3-4 TIMES BEFORE THE CAR WAS ABLE TO HOLD ON DRIVE

2/22/2018

WHEN USING IPHONE WITH BLUETOOTH RANDOM SONGS PLAY WHILE DIRECTIONAL NAVIGATION PROMPTS PLAY (SEE HTTP://OSXDAILY.COM/2017/07/29/STOP-AUTOPLAYING-MUSIC-IPHONE-CAR-BLUETOOTH/). THIS CREATES DRIVER DISTRACTION. THE PROBLEM IS MORE-SO WITH APPLE IOS RATHER THAN THE PRIUS IN PARTICULAR.

3/11/2018

3 more complaints are available in this category.

VISIBILITY/WIPER

5 Reports12% of total

Previewing the first 2 complaint summaries.

WHILE DRIVING ON THE HIGHWAY IN THE RAIN AT 55MPH A VERY SMALL PEBBLE/BUG STRUCK THE LOWER RIGHT WINDSHIELD BELOW THE WIPER. IT WAS NOT VERY LOUD, BUT DID CREATE A CRACK IN THE WINDSHIELD WITH A FEW MINUTES. WITHIN A FEW DAYS THE CRACK HAS SPREAD ACROSS THE ENTIRE WINDSHIELD.

7/22/2018

LAST YEAR,JUNE 2017, WHILE THE CAR WAS PARKED WE NOTICED THERE WAS A HAIRLINE CRACK ON THE WINDSHIELD. WE RECEIVED SOME QUOTES SAYING IT WOULD BE ABOUT $900 TO FIX. SO WE DECIDED TO GO WITH AN ADHESIVE INJECTION AND PAID ABOUT $50 FOR SOMEONE TO COME FIX IT. HOWEVER, AFTER A MONTH, IT SPREAD. WE HAD NO CHOICE BUT TO REPLACE THE WINDSHIELD. LAST MONTH, SAME THING HAPPENED. CAR WAS PARKED, NOTHING HIT IT. SAME HAIRLINE CRACK. I HAVEN'T FIXED IT BECAUSE OF THE HEAVY EXPENSE. BUT IT HAS SPREAD. CHECKED ONLINE TO SEE IF ANYONE ELSE HAS THE SAME ISSUE AND FOUND THERE'S A CLASS ACTION LAWSUIT FOR THIS BUT IT'S FOR 2014-2016 TOYOTA PRIUS. APPARENTLY THEY HAVE NOT FIXED THIS PROBLEM FOR THE 2017 PRIUS. ALSO, THERE'S A RECALL FOR MY CAR FOR ANOTHER ISSUE.

10/6/2018

3 more complaints are available in this category.

VEHICLE SPEED CONTROL

4 Reports9% of total

Previewing the first 2 complaint summaries.

I STARTED MY CAR, PUT IT IN DRIVE AND BEGAN TO MAKE A U TURN OUT OF A PARKING LOT WHEN IT SUDDENLY ACCELERATED ON ITS OWN. I HAD THREE TURNS I HAD TO MAKE IN QUICK SUCCESSION (U TURN, LEFT ON PUBLIC DRIVEWAY, RIGHT ON MAIN ROAD) TO GET ON TO THE MAIN ROAD, AND I DID THIS AT BREAK NECK SPEED. BY THE SECOND TURN I WAS GIVING ALL MY STRENGTH TO TRYING TO GET THE BRAKE TO WORK, UNSUCCESSFULLY (LOCKED), AND WAS FULLY FOCUSSED ON TURNING THE CAR SAFELY TO SAVE MY LIFE AT SUCH HIGH SPEED. MY TIRES SQUEALED ON THE THIRD TURN AND MY CELL PHONE FLEW THROUGH THE AIR. I COULD NOT MAKE A TIGHT RIGHT TURN SO MADE MY TURN IN TO THE LEFT LANE (PROUD OF MY DRIVING SUCCESS GIVEN THE SPEED). ONCE I NAVIGATED THE TURNS THE CAR SLOWED DOWN AND BRAKES WORKED AS NORMAL. THIS ALL HAPPENED IN AROUND 20 SECONDS I'D GUESS, AND LESS THAN 1/4 MILE I THINK. JUST FORTUNATE THERE WERE NO CARS COMING IN EITHER DIRECTION. I AM ALIVE TO TELL THIS STORY. I HAD THE CAR TOWED TO A DEALER AND AM AWAITING TO HEAR WHAT THE HAVE TO SAY. I AM PETRIFIED AT THE THOUGHT OF GETTING BACK IN TO THAT CAR.

6/14/2019

TL* THE CONTACT OWNS A 2018 TOYOTA PRIUS. THE CONTACT STATED THAT WHILE OPERATING THE VEHICLE THE VEHICLE HAD EXPERIENCED UNINTENDED ACCELERATION AND CRASHED INTO A SECOND PARKED VEHICLE. NO INJURIES WERE REPORTED. A POLICE REPORT WAS TAKEN AT THE SCENE. THE VEHICLE WAS TOWED TO THE LOCAL DEALER DCH TOYOTA (1504 US HWY 1 NORTH BRUNSWICK NJ) BUT THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 6,000.

8/30/2019

2 more complaints are available in this category.

EXTERIOR LIGHTING

4 Reports9% of total

Previewing the first 2 complaint summaries.

AUTOMATIC HIGH BEAMS DIM AND THEN FAIL TO BRIGHTEN INTERMITTENTLY. WHEN DRIVING, AUTOMATIC HIGH BEAMS FUNCTION AS INTENDED THEN THE DASH INDICATOR SPONTANEOUSLY TURNS OFF AND THE HEADLIGHTS FAIL TO BRIGHTEN. VEHICLE HAS BEEN TO THE DEALERSHIP SERVICE DEPARTMENT TWICE FOR THIS. THE SECOND TIME , THE DEALER WAS ABLE TO DUPLICATE THE PROBLEM BOTH IN MY VEHICLE AND IN A 2019 PRIUS FROM THE INVENTORY. TOYOTA TECHNICAL ASSISTANCE IS ADAMANT THAT THE PROBLEM IS NORMAL FUNCTIONALITY. I FAIL TO UNDERSTAND HOW THE HIGH BEAMS NOT BRIGHTENING WHEN THEY SHOULD DURING NIGHT DRIVING IS NORMAL FUNCTIONALITY.

11/7/2019

THE CAR IS INADEQUATE IN THE WINTER. WHEN IT SNOWS I CAN'T KEEP THE WINDOWS CLEAN. THEY CHANGED THE FITTINGS AND I CAN'T EVEN PUT WINTER BLADES ON THE CAR. ALSO, AND THIS APPLIES TO ALMOST ALL NEW CARS AS WELL, THE LED LIGHTS FREEZE OVER. IT'S A SAFETY HAZARD NOT TO HAVE LIGHTS THAT WORK. AND IT'S A SAFETY HAZARD TO HAVE TO GET OUT OF THE CAR IN DANGEROUS CONDITIONS TO TRY AND SCRAPE ICE OFF THE WINDOWS AND LIGHTS. THE FRONT AND REAR LIGHTS GET CAKED WITH ICE AND SNOW. THIS PICTURE IS OF MY WINDSHIELD AFTER AN HOUR OF WARMING UP. THE WIPERS STAY CAKED WITH ICE. AND WHEN I TURN THEM ON, THIS IS WHAT HAPPENS. THEY SMEAR THE WINDSHIELD WITH ICE. THEY SMEAR IT WITH WATER TOO. I CAN'T SQUEEGEE WATER WITH ICE. I'D LOVE TO TRADE IT IN, BUT EVERYONE HAS LED LIGHTS. THEY'RE A SAFETY HAZARD. AND THESE ISSUES ARE KEEPING ME FROM BUYING A NEW CAR. I WOULD APPRECIATE IT IF YOU ADDRESSED THESE ISSUES. THE CAR COMPANIES WON'T LISTEN TO ME. THANK YOU HAVE A GREAT DAY

11/8/2019

2 more complaints are available in this category.

SERVICE BRAKES

3 Reports7% of total

Previewing the first 2 complaint summaries.

THIS IS A BRAND NEW CAR I PURCHASED. THERE IS A HIGH-PITCHED NOISE THAT THE BRAKE PEDAL MAKES WHEN YOU DEPRESS THE BRAKE PEDAL. I THOUGHT THIS WAS PART OF THE BEEPS THE CAR MAKES, BUT IT'S NOT. THE BRAKE BOOSTER WAS REPLACED, BUT THE BRAKE PEDAL CONTINUES TO MAKE A HIGH-PITCHED CHIRPING NOISE. I RETURNED TO TOYOTA SERVICE TO HAVE IT CHECKED OUT, BUT THEY SAID THAT THIS IS A NORMAL SOUND THAT OTHER PRIUSES MAKE. THIS CONCERNS ME THAT THE BRAKES ARE DEFECTIVE SINCE I'VE NEVER HEARD OF BRAKES THAT SOUND LIKE THIS.

6/25/2018

I STARTED MY CAR, PUT IT IN DRIVE AND BEGAN TO MAKE A U TURN OUT OF A PARKING LOT WHEN IT SUDDENLY ACCELERATED ON ITS OWN. I HAD THREE TURNS I HAD TO MAKE IN QUICK SUCCESSION (U TURN, LEFT ON PUBLIC DRIVEWAY, RIGHT ON MAIN ROAD) TO GET ON TO THE MAIN ROAD, AND I DID THIS AT BREAK NECK SPEED. BY THE SECOND TURN I WAS GIVING ALL MY STRENGTH TO TRYING TO GET THE BRAKE TO WORK, UNSUCCESSFULLY (LOCKED), AND WAS FULLY FOCUSSED ON TURNING THE CAR SAFELY TO SAVE MY LIFE AT SUCH HIGH SPEED. MY TIRES SQUEALED ON THE THIRD TURN AND MY CELL PHONE FLEW THROUGH THE AIR. I COULD NOT MAKE A TIGHT RIGHT TURN SO MADE MY TURN IN TO THE LEFT LANE (PROUD OF MY DRIVING SUCCESS GIVEN THE SPEED). ONCE I NAVIGATED THE TURNS THE CAR SLOWED DOWN AND BRAKES WORKED AS NORMAL. THIS ALL HAPPENED IN AROUND 20 SECONDS I'D GUESS, AND LESS THAN 1/4 MILE I THINK. JUST FORTUNATE THERE WERE NO CARS COMING IN EITHER DIRECTION. I AM ALIVE TO TELL THIS STORY. I HAD THE CAR TOWED TO A DEALER AND AM AWAITING TO HEAR WHAT THE HAVE TO SAY. I AM PETRIFIED AT THE THOUGHT OF GETTING BACK IN TO THAT CAR.

6/14/2019

1 more complaint is available in this category.

STRUCTURE:BODY

3 Reports7% of total

Previewing the first 2 complaint summaries.

THE HEAT SHIELD ON THE UNDERSIDE OF THE CAR, BY THE STORAGE BATTERY CAME LOSE WHILE DRIVING AND WAS DAMAGED. IT IS HELD IN PLACE BY ONLY FOUR PLASTIC PINS. THE CAR IS SO LOW TO THE GROUND THAT IT IS HARD TO CLEAR NORMAL SPEED BUMPS LET ALONE OLDER LARGER ONES. WE WERE TRAVELING A HOUSING ADDITION LESS THAN 20 MPH AND JUST WENT OVER AN OLDER HIGH SPEED-BUMP AND PUDDLE WHEN IT OCCURRED. WE DROVE THE LAST 100 OR SO FEET HOME AND WIRED IT UP OUT OF THE WAY SO THE CAR COULD BE DRIVEN AT LOW SPEED TOO THE DEALERSHIP. THE DEALERSHIP TOLD US THIS WAS DAMAGE DUE TO OUR DRIVING NEGLIGENCE IE: "WE HIT SOMETHING". WHEN THIS SHIELD COMES OFF IT FALLS STRAIGHT INTO THE VEHICLE EXHAUST PIPE AND GROUND, THERE IS NO SIMPLE WAY TO REMOVE THE PIECE UNTIL A FULL REPAIR CAN BE COMPLETED. IT MUST BE WIRED UP OFF THE GROUND OR PART OF THE WHEEL AND EXHAUST MUST BE DISCONNECTED. IT TOOK THE DEALERSHIP THREE TRIES AND OVER A MONTH TO GET THE CORRECT SHIELD IN AND PERFORM THE REPAIR. THE PART NUMBER IN THE TOYOTA PARTS SPECIFICATION AND THE REPAIR PARTS WAREHOUSE OR NOT THE SAME.

10/11/2019

I WAS DRIVING UP TO MY GARAGE ON THE SIDE OF MY HOUSE ON A CLEAR DAY, EARLY AFTERNOON. I WAS TRAVELING ABOUT 3 MPH AND TRIED TO STOP TO PARK IN FRONT OF THE GARAGE DOOR. I DEPRESSED THE BRAKE PEDAL AND IT DID NOT ENGAGE, BUT LURCHED FORWARD INTO THE GARAGE, CRASHING INTO THE GARAGE AND CAUSING DAMAGE TO BOTH THE GARAGE AND THE AUTO.

10/26/2019

1 more complaint is available in this category.

AIR BAGS

3 Reports7% of total

Previewing the first 2 complaint summaries.

TL* THE CONTACT OWNS A 2018 TOYOTA PRIUS. THE CONTACT STATED THAT WHILE DRIVING ABOUT 65 MPH, ANOTHER VEHICLE PULLED INTO THE HIGHWAY, WITHOUT STOPPING, AND CRASHED INTO THE FRONT DRIVER'S SIDE FENDER OF THE CONTACT'S VEHICLE. THE CONTACT STATED THAT NONE OF THE AIR BAGS DEPLOYED. THERE WAS NO WARNING LIGHTS ILLUMINATED. THE CONTACT SUSTAINED INJURIES THAT REQUIRED MEDICAL ATTENTION, INCLUDING BACK, NECK, ANKLE AND HEAD INJURIES. HE ALSO STATED THAT HE RIPPED THE TENDON ON THE RING FINGER. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOTALED AND WAS TOWED TO A TOW YARD. THE DEALER WAS NOT CALLED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 70,000. *LN*JB

5/13/2020

AIRBAG LIGHT ON

5/12/2023

1 more complaint is available in this category.

POWER TRAIN

2 Reports5% of total

Previewing the first 2 complaint summaries.

THE GEAR WOULD SHIFT EITHER FROM 'DRIVE TO NEUTRAL' OR 'REVERSE TO NEUTRAL' THIS HAPPENED MORE THAN 10 TIMES WHEN I HAD MY SISTER, MOTHER, AND FATHER IN THE CAR. 1) IT HAPPENED WHEN I WAS PULLING OUT OF THE GARAGE (ABOUT 20 DEGREE ANGEL) GOING UP THE HILL. I WENT TO PICK THEM UP, ALL 3 PF THEM WENT IN. I HAD MY FOOT ON THE BRAKE AND GEAR ON DRIVE, WHEN I LET GO OF THE BRAKE THE GEAR SHIFTED AUTOMATICALLY ON NEUTRAL. AFTER, 3 TRIES, THE CAR FINALLY WAS ABLE TO GO FORWARD WITHOUT STRUGGLE. 2) I WAS TRYING TO BACK IN ONE OF THE SPOT (FLAT GROUND), FOOT ON THE BRAKE, GEAR ON REVERSED. WHEN I LET GO OF THE BRAKE THE GEAR SHIFTED TO NEUTRAL AUTOMATICALLY. I STRUGGLED FOR 3-4 TIMES BEFORE THE WAS ABLE TO HOLD ON REVERSED AND PARK THE CAR SAFELY. 3) WHEN I WAS IN THE MIDDLE OF THE INTERSECTION (FLAT GROUND). I HAD MY FOOT ON THE BRAKE, WHEN I FINALLY WAS ABLE TO MAKE A TURN, MY FOOT ON THE FOOT AND GEAR ON DRIVE, WHEN I LET GO OF THE BRAKE THE GEAR SHIFTED TO NEUTRAL OF THE THE SUDDEN, I HAD TO TRY 3-4 TIMES BEFORE IT WAS ABLE TO MOVE FORWARD WITHOUT A STRUGGLE 5) I WAS ON A HILL (ABOUT 20-30 DEGREE ANGLE) FACING UP. MY FOOT WAS ON THE BRAKE AND GEAR ON DRIVE, WHEN I LET GO OF THE BRAKE THE GEAR WAS SHIFTED TO NEUTRAL. I STRUGGLED FOR 5-10 MINUTES (GOING FROM DRIVE TO NEUTRAL BACK IN FORTH) AS MY CAR WAS NOT ABLE TO HOLD DRIVE MODE, I EVENTUALLY ASKED MY FAMILY TO GET OUT OF THE CAR AS I WAS GETTING WORRIED AND FRUSTRATED, MY FAMILY WAS OUT OF THE CAR BUT I WAS STILL STRUGGLING, IN THE PROCESS I HIT A CAR BEHIND ME. 6) I WAS FINALLY ABLE TO PARK THE CAR IN WITH ANY PASSENGERS AND SOMEWHERE FLAT GROUND. I LEFT MY CAR FOR 30 MINUTES AND CAME TO DRIVE MY CAR. I STARTED MY CAR, I HAD MY FOOT ON THE BRAKE AND GEAR ON DRIVE. I LET GO OF THE BRAKE THEN MY GEAR SHIFTED TO NEUTRAL AGAIN, I STRUGGLED FOR 3-4 TIMES BEFORE THE CAR WAS ABLE TO HOLD ON DRIVE

2/22/2018

Stopped at red light, then the car didn't accelerate when hitting gas. Engine revs but the car does not accelerate. It happened multiple time when the car was out in sun with full ac on(100f). Happened once in intersection and almost got hit head on

7/6/2022

SEATS

2 Reports5% of total

Previewing the first 2 complaint summaries.

HORRIBLE BACK PAIN CAUSED BY THE PRIUS' DRIVER SEAT. CAR SEAT SHOULD NOT PASS STANDARDS. EXTREMELY UNHEALTHY.

7/18/2018

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.

10/31/2023

ENGINE

2 Reports5% of total

Previewing the first 2 complaint summaries.

TL* THE CONTACT OWNS A 2018 TOYOTA PRIUS. WHILE DRIVING 20 MPH, THE ELECTRICAL SYSTEM FAILED AND EVERYTHING IN THE VEHICLE SHUT DOWN. THE VEHICLE DECELERATED AND LOST POWER. WHILE THE VEHICLE COASTED, THE ENGINE RESTARTED ON ITS OWN. THE VEHICLE WAS DRIVEN TO TOYOTA VALLEJO (201 AUTO MALL PARKWAY, VALLEJO, CA 94591, 707-552-4545) TO BE DIAGNOSED, BUT THE FAILURE COULD NOT BE REPLICATED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 8,600.

7/10/2019

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.

3/26/2025

ELECTRICAL SYSTEM

2 Reports5% of total

Previewing the first 2 complaint summaries.

ERROR CODES P0113 AND P0102 AND WARNING MESSAGES FOR CHECK ENGINE AND ICS MALFUNCTION* LAPPEARED WHEN STARTING THE GARAGED VEHICLE IN APPROXIMATELY 55F ROOM TEMPERATURE. TOYOTA OF ESCONDIDO AND TOYOTA'S CUSTOMER CARE TELEPHONE CENTER EXPLAINED THAT THEY WILL NOT INSPECT (ALTHOUGH UNDER THE 3-YEAR/36,000 MILES WARRANTY) WITHOUT A SERVICE FEE. ONLINE, REPORTS THAT A FAILING 12V BATTERY MAY CAUSE MULTIPLE CODES TO BE TRIGGERED WERE ALSO MET WITH A REQUEST FOR A $110 DIAGNOSTIC FEE. THE BATTERY IS ALSO UNDER THE 3-YEAR/36,000 MILE WARRANTY. ERROR CODES AND MESSAGES IMPLICATE FUEL EFFICIENCY, POLLUTION AND SAFETY ISSUES. *ICS IS THEIR COLLISION SENSOR SYSTEM.

1/2/2020

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.

8/26/2025

FUEL/PROPULSION SYSTEM

2 Reports5% of total

Previewing the first 2 complaint summaries.

UNKNOWN My car started stalling when it comes to a full stop. I.e. if I stop at a red light or stop sign, and I then press the gas, it stalls. It might inch forward, but it doesn’t really accelerate. This happened last year, and I took it to the dealer. They couldn’t reproduce the results, and they could only suggest changing my small 12V battery. Today, it stalled 8 times, between 2 short drives. Each at a stop sign only travelling ~5 miles total. I have an appointment at the dealer but this is exactly what happened last year with no diagnosis. No check engine light is on or anything.

6/22/2022

Stopped at red light, then the car didn't accelerate when hitting gas. Engine revs but the car does not accelerate. It happened multiple time when the car was out in sun with full ac on(100f). Happened once in intersection and almost got hit head on

7/6/2022

WHEELS

1 Report2% of total

Previewing the first 1 complaint summaries.

NEW CAR JUST OVER 1000 MILES. REAR TIRE BLOWS ON FREEWAY, NO POTHOLE OR ANYTHING HIT. SINCE OWNING THE CAR I'VE HEARD A FAINT THUDDING WHEN GOING OVER 65 MILES AN HOUR. NO INDICATOR LIGHT AND THE TIRES FELT HARD, NOT DEFLATED WHEN I CHECKED. SO I THOUGHT IT MIGHT JUST BE AN UNEVEN ROAD MAKING THAT SOUND. NOW I BELIEVE IT WAS THE TIRE. I HAVE TONS OF PHOTOS IF NEEDED. I FISHTAILED ON THE FREEWAY AND WAS CLOSE ENOUGH TO AN EXIT THAT I GOT OFF ON IT. LUCKILY DID NOT CAUSE AN ACCIDENT.

12/14/2018

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

1 Report2% of total

Previewing the first 1 complaint summaries.

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.

12/5/2024

SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT

1 Report2% of total

Previewing the first 1 complaint summaries.

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.

12/5/2024

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

1 Report2% of total

Previewing the first 1 complaint summaries.

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.

3/26/2025

VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR

1 Report2% of total

Previewing the first 1 complaint summaries.

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.

4/23/2025

LATCHES/LOCKS/LINKAGES

1 Report2% of total

Previewing the first 1 complaint summaries.

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.

7/2/2025

About This Data

Data and Methodology

MethodologyHow we score →

Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.

FAQ

What are the most common owner complaints for the 2018 Toyota Prius?

The most reported complaint category for the 2018 Toyota Prius is UNKNOWN OR OTHER, with 5 owner reports. That is about 12% of all complaints logged here. Other recurring themes include UNKNOWN OR OTHER, VISIBILITY/WIPER, VEHICLE SPEED CONTROL.

Are complaints about the 2018 Toyota Prius a serious warning sign?

Potentially. 14 complaint reports fall into higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components. That does not prove every vehicle has a defect, but repeated complaints in those systems justify a more careful pre-purchase inspection.

How should buyers use complaint data for the 2018 Toyota Prius?

Use complaints as an early pattern to investigate, not a standalone verdict. Start with the top complaint categories, compare those themes against the recall report and maintenance guide, then inspect service records for evidence that the same problem areas were already addressed. If the same issue appears repeatedly across complaints and recalls, treat it as a real ownership-risk flag.

Are complaints about the 2018 Toyota Prius severe?

14 complaint reports involve higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection before purchase.

Complaint list entries are sourced from owner-submitted NHTSA ODI records.

Read complaint summaries

Toyota Prius: How should complaint data influence buying decisions?

Use complaint patterns together with recalls and maintenance guidance to estimate ownership risk and inspection priorities.

Carfocal links complaint data directly to recall and maintenance routes for the same model year.

Return to full vehicle report
Complaint entries
43
Top-topic view
5 grouped topics shown
Primary source
NHTSA ODI owner complaint records

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In this guide

  1. 01Overview
  2. 02Common Problems
  3. 03Owner Complaints
  4. 04Data and Methodology

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