Problems · NHTSA complaints

2003 Toyota Prius problems

Owners filed 111 complaints about the 2003 Toyota Prius with NHTSA between Feb 2003 and Feb 2026. The most-cited component is steering (39).

Complaints
111
Filed with NHTSA
Crashes
6
Reported by owners
Fires
0
Reported by owners
Injuries
6
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Steering39
  2. Electrical system13
  3. Engine and engine cooling13
  4. Tires12
  5. Power train9
  6. Vehicle speed control8
  7. Service brakes, hydraulic8
  8. Service brakes6
  9. Equipment4
  10. Service brakes, electric3
  11. Structure2
  12. Equipment adaptive/mobility2
  13. Electronic stability control (esc)2
  14. Suspension2

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 4, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
200311
20047
20057
20063
200710
20089
20095
201024
201111
20123
20134
20145
20152
20162
20172
20180
20191
20203
20210
20221
20230
20240
20250
20261

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Steering

39 reports1 crash1 related recall
“The contact owns a 2003 Toyota Prius. The contact stated that while driving at 65 MPH, the steering wheel began to vibrate with an unknown message displayed on the instrument panel. As the failure persisted, the message disappeared, and the contact was able to drive to her destination. Upon restart of the vehicle, the contact received a do not drive message on the instrument panel with the steering wheel vibrating. Due to the failure, the contact had the vehicle towed to a dealer where it was diagnosed with a defective steering sensor. Upon investigation, the contact linked the failure to NHTSA Campaign Number: 11V304000 (Steering). The manufacturer was notified of the failure and referred her to the NHTSA Hotline for assistance. The vehicle was not repaired. The failure mileage was approximately 176,000.”
Owner complaint to NHTSAFiled Oct 26, 2022SteeringODI 11491025

Electrical system

13 reports
“FOR NO APPARENT REASON WHEN DRIVING, THE EMERGENCY BRAKE WILL ENGAGE, WITHOUT PRESSING THE E BRAKE PEDAL. ALSO, INTERMITTENT ONCE CAR IS PARKED AND DOORS LOCKED, ALARM WILL JUST START GOING OFF FOR NONREASON.”
Owner complaint to NHTSAFiled Jul 10, 2020Electrical system, Service brakesODI 11338658

Engine and engine cooling

13 reports
“THERE IS NO THERMOSTAT GAUGE IN A 2003 TOYOTA PRIUS , THE CAR OVER HEATS AND YOU DON'T KNOW UNTIL YOUR IN THE MIDDLE OF TRAFFIC NEARLY GETTING KILLED. TOYOTA WAS CONTACTED, BUT SAY NOT A RECALL AND THEY DON'T HONESTLY CAR CAUSE CAR IS OLD . THAT'S NOT RIGHT , ANYTHING YOU STILL USE FROM CARS OR EVEN MEDICINE HAVE LATER COME BACK TO HURT OR KILLED PEOPLE. THERE IS NO HOT TO COLD GAUGE IN THE CAR , 2003 ONLY . I HAVE INVESTIGATED AND SEE PEOPLE PUBLISH ABOUT THIS BUT LET IT SLIP BY . I WAS DRIVING WITH NO INSTALLED GAUGE AND SURVIVED THROUGH MAKE A LEFT HAND TURN ON A STALLED VEHICLE THAT OVER HEATED AND WAS LATER CHECK BY TOYOTA TECHNICIANS THAT SAID F THERE WAS A THERMOSTAT GAUGE PROBLEM WOULD OF MOST LIKELY BE AVOIDED. SOMEBODY CAN'T KEEP OPEN AND CLOSING THE RADIATOR CAP CAUSE OF THIS MISSING GAUGE . OIL HAS DIPSTICK YOU CHECK !!! SAFELY TOO. NOT GOING FRY MY FACE OR BURN MY HANDS ON KEEP CHECKING THE RADIATOR. PLUS WITH A PROPER GAUGE YOU MIGHT KNOW IF YOUR CAR IS COOLED DOWN OR SAFER TO CHECK. TOYOTA HAD REFUSED TO ADDRESS OR CLAIM ANY ISSUES. CASE# [XXX]. PEOPLE LIVES ON AT STAKE CAUSE THEY WANTED TO A. SAVE MONEY B. DON'T KNOW HOW FORGET TO INSTALL THE…”
Owner complaint to NHTSAFiled Jul 31, 2017Engine and engine cooling, Electrical system, Fuel/propulsion systemODI 11011713

Tires

12 reports1 crash
“TL* THE CONTACT OWNS A 2003 TOYOTA PRIUS HYBRID. THE CONTACT STATED THAT SHE HAD EXPERIENCED SEVERAL FAILURES WITHIN THE VEHICLE SINCE PURCHASING THREE MONTHS AGO. THE TRANSMISSION WAS REPLACED, THE LEFT FRONT TIRE HAD A LEAK AND THE INVERTER WAS REPLACED BECAUSE SEVERAL LIGHTS ON THE INSTRUMENTAL PANEL REMAINED ILLUMINATED. ON DECEMBER 3, 2010, WHILE DRIVING APPROXIMATELY 10 MPH THE STEERING WHEEL BEGAN TO SHAKE VIOLENTLY. THE VEHICLE WAS TAKEN BACK TO THE DEALER WHO PERFORMED A DIAGNOSTIC TEST BUT WAS UNABLE TO LOCATE A FAILURE CODE. THE DEALER TEST DROVE THE VEHICLE BUT WAS UNABLE TO DUPLICATE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 85,000 AND THE CURRENT MILEAGE WAS 86,000.”
Owner complaint to NHTSAFiled Dec 7, 2010Steering, Power train, TiresODI 10369488

Power train

9 reports
“2003 TOYOTA PRIUS - DEVELOPED RATTLE AND TOOK TO THE DEALER. AFTER A LONG EXAMINATION, DEALER DETERMINED THE PROBLEM WAS WITH THE POWER STEERING RACK. DEALER ACKNOWLEDGED THAT THERE HAD BEEN NO ACCIDENT AND COULD NOT DETERMINE A CAUSE. THE REPAIR COST QUOTED WAS $3,500, ONE HALF OF THE RESALE VALUE OF THE CAR. I CONTACTED TOYOTA MOTOR SALES AND WAS TOLD THAT SINCE THE CAR HAD APPROX. 62,000 MILES, THEY WOULD DO NOTHING. THE DEALER HAS INDICATED A WILLINGNESS TO NEGOTIATE ON THE REPAIR PRICE. *TR”
Owner complaint to NHTSAFiled Jul 12, 2010Power trainODI 10342593

Vehicle speed control

8 reports1 crash
“CUSTOMER STATES VEHICLE BEGAN RACING WILDLY, ACTING LIKE TRANSMISSION WAS NOT ENGAGED. DRIVER STATED AS NOT DEPRESSING THE ACCELERATOR DURING THE ALLEGED EVENT. CUSTOMER WAS DRIVING ON STEEP UPHILL GRADES AT APPROXIMATELY 45 MPH. VEHICLE WAS SHUT OFF AND RESTARTED. VEHICLE PROCEEDED TO OPERATE WITH 6-7 REOCCURRENCES THROUGHOUT 100 MILES OF DRIVING AT HIGHWAY SPEEDS. CUSTOMER STATES THAT THIS HAS NEVER HAPPENED BEFORE HOWEVER 6 MONTHS EARLIER THE VEHICLE WOULD NOT START AND WOULD STALL REPEATEDLY. CUSTOMER STATES VEHICLE AS RELATIVELY TROUBLE FREE WITH A HISTORY OF ROUTINE MAINTENANCE AS WELL AS REPLACEMENT OF THE REAR WHEEL BEARINGS. (NOTE: THIS RECORD WAS RECEIVED VIA TELPHONE BY AN ODI INVESTIGATOR RATHER THAN THROUGH OUR HOTLINE OR ONLINE FORM. IT HAS BEEN ADDED TO OUR COMPLAINT FILE IN RESPONSE TO A THIRD PARTY REQUEST.) UPDATED 05/03/12*LJ UPDATED 05/04/12”
Owner complaint to NHTSAFiled May 10, 2011Vehicle speed controlODI 10428551
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 4, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.