NHTSA ID Number: 11651221
Incident Date: 2025-03-14
Manufacturer's Name: Toyota
Motor Corporation
Vehicle/Equipment Make: TOYOTA
Vehicle/Equipment Model: PRIUS
Model Year: 2012
9999 If Unknown Or N/A
Vehicle Identification Number: JTDKN3DU5C5
Vehicle Mileage At Failure:
Vehicle Speed:
Number Of Occurrences:
Was Vehicle Towed: No
Consumer Location: Dublin, OH
Summary of Complaint
Subject: Safety Complaint – 2012 Toyota Prius Brake Booster Failure (C1391 Code) I am writing to formally report a serious safety defect in my 2012 Toyota Prius involving the brake system. Recently, my vehicle’s dashboard displayed the ABS, traction control, and brake warning lights, indicating a critical braking issue. Upon diagnostic testing at a Toyota dealership, the vehicle was found to have DTC Code C1391 – Brake Booster Leak/Accumulator Failure. I later discovered that Toyota acknowledged this defect and issued a Customer Support Program (CSP) to cover repairs. However, I was never notified, despite always servicing my vehicle at Toyota dealerships. When I contacted Toyota, they confirmed that my vehicle has been flagged in their system, yet I was never received anything in the mail about the potential brake failure. Toyota initially set the CSP expiration in 2023, later extending it to May 2025, but they have refused to repair my vehicle under this program. The estimated repair cost is $4,680.09 along with a diagnostic fee of 206.09, which is a significant financial burden for an issue stemming from a known manufacturing defect. Most importantly, this is a major safety hazard: My brakes now produce a loud hissing sound when pressed, indicating imminent failure. If the brake booster fails completely, it could result in a loss of braking power, endangering myself, passengers, and others on the road. Numerous Prius owners have reported similar failures, yet Toyota has not issued a formal recall. I urge NHTSA to investigate this defect further and push Toyota to issue a full recall instead of a limited support program that many owners were unaware of. Given the life-threatening nature of brake failure, Toyota should not be allowed to limit coverage or deny repairs for a problem they have long recognized. I respectfully request that NHTSA take action to ensure Toyota addresses this safety defect responsibly.
Check if your Toyota has a Recall
Complaint 11651221 Documents
For Latest Documents related to this Complaint, visit the NHTSA Website.
Click the (+) Plus Sign
Then click Associated Document(s).
Most Complaints Don't have any PDFs.
- Advanced VCI Box, Industry-leading J2534 Pass-Thru...
- High-Speed OEM-Level Diagnostics & Programming: Unlock true...
- Coverage for 17 Car Brands & Ultra Reliability: Works...
- User-Friendly RLink Platform & Expert Support: TOPDON’s...
- 6.6 ft USB-C Cable & Portable Storage Case: The RLink J...
This product presentation was made with AAWP plugin.
Search NHTSA Database for Recalls
Search NHTSA Database for (TSB's) Technical Service Bulletins
Technical Service Bulletins TSB's List
Search NHTSA Database for Vehicle Investigations
CRASH: No
WAS VEHICLE INVOLVED IN A CRASH
FIRE: No
WAS VEHICLE INVOLVED IN A FIRE
INJURIES: 0
NUMBER OF PERSONS INJURED
DEATHS: 0
NUMBER OF FATALITIES
Was Medical Attention Required: No
Was Incident Reported To Police: No
Date Of Incident: 2025-03-14
(YYYY-MM-DD)
Date Added To File: 2025-03-27
(YYYY-MM-DD)
Date Complaint Received By NHTSA: 2025-03-27
(YYYY-MM-DD)
Date Purchased:
(YYYY-MM-DD)
Was Original Owner: No
Product Type: Vehicle
V = Vehicle T = Tires E = Equipment C = Child Restraint
Specific Component's Description: SERVICE BRAKES
Anti-Lock Brakes: No
Cruise Control: No
Number Of Cylinders:
Drive Train Type:
[AWD, 4WD, FWD, RWD]
Fuel System:
FI = Fuel Injection TB = Turbo
Fuel Type:
BF = BiFuel CN = CNG/LPG DS = Diesel GS = Gas HR = HybridElectric
Vehicle Transmission Type [Auto, Man]:
(DOT) Department Of Transportation Tire Identifier:
Tire Size:
Location Of Tire:
FSW = Driver Side Front DSR = Driver Side Rear FTR = Passenger Side Front PSR = Passenger Side Rear SPR = Spare
Type Of Tire Failure:
BST = Blister BLW = Blowout TTL = Crack OFR = Out Of Round TSW = Puncture TTR = Road Hazard TSP = Tread Separation
Was Defective Tire Repaired:
Was Part Original Equipment:
Date Of Manufacture:
(YYYYMMDD)
Type Of Child Seat:
B = Booster C = Convertible I = Infant IN = Integrated TD = Toddler
Installation System:
A = Vehicle Safety Belt B = Latch System
Dealer's Name:
Dealer's Telephone Number:
Dealer's City:
Dealer's State:
Dealer's Zipcode:
SOURCE OF COMPLAINT CODE:
CAG = Consumer Action Group CON = Forwarded From A Congressional Office DP = Defect Petition,result Of A Defect Petition EVOQ = Hotline VOQ EWR = EARLY WARNING REPORTING INS = Insurance Company IVOQ = NHTSA Web Site LETR = Consumer Letter MAVQ = NHTSA Mobile APP MIVQ = NHTSA Mobile APP MVOQ = Optical Marked VOQ RC = Recall Complaint, Result Of A Recall Investigation RP = Recall Petition, Result Of A Recall Petition SVOQ = Portable Safety Complaint Form (PDF) VOQ = NHTSA Vehicle Owners Questionnaire
Incident State Code:
Vehicle Operator's Name:
Previous Complaint | Next Complaint |
- WHY CHOOSE THE 2025 CR MAX -Upgrade the latest diagnostic capabilities for all vehicles after 1996: upgrade to 49+maintenance services; 46 extra specific functions; real all systems/all control modules diagnose; over 40K+ bidirectional actuation tests for diagnosing all control moduels of cars; Powerful full OBD2 Functions; built-in ECU Coding for BMW/ Audi/ VW/ RollsRoyce; Fr ee V.A.G Guide Function; Battery retistration for new battery adaptation and more. It covers all vehicle diagnostic services and some special professional vehicle maintenance servces, assists you to do home DIY vehicle maintenance or car repair as a pro technician.
- NEWEST IN INNOVATION FULL OBD2 SERVICES- iCarsoft auto car diagnostic scanner compatible with CAN-FD, CR MAX can do it all-reads and clears trouble codes, ALL SYSTEM DIAGNOSIS such as engine, transmission, ABS and airbag etc. CR MAX code reader for all cars can perform I/M Readiness, Live Data, Freeze Frame, Vehicle Information, Monitor Test, On-Board Monitor, E vap System Test,O2 Sensor Test,DTC Library Lookup,etc. (Warm Tips: If you car is after 2023,please contact us for compatibility; 3. It comes with 16PIN OBD2 diagnostic adapter, please check your car diagnostic socket if it is 16pin socket, if your car is 14pin diagnostic socket please contact us for the solution.)
- 49 RESET+ 46 SERVICES- Performs: Oil Reset, EPB,SAS,Throttle, D-P - F, Battery, ABS, Injector, TPMS, Suspension, AC, Head Lamp, Body Stablity, Engine, Tramsmission, Airbag, Seat, Door-Win-Roof, Fuel Pump, Door, E-G- R.+21 NEWEST SERVICES( Need update scanner)-AdBlue, Clutch, Crankshaft, High Voltage Battery, Cruise Control, NO xSensor, Rain Sensor, Stop And Start, Turbocharger, Head Up Display, Radar Camera, Vehicle Setup, Cyliner Misfire Check,Speedlimitassist, ControlUnitReset,OxygenSensor, Seatbelt. Extra 46+ extra services based on car brand.(Tips: Quantity of reset/ calibration fucitons are based on car system that your vehicle model has)
- REVOLUTIONARY 40000+BIDIRECTIONAL ACTIVE TESTS: Upgraded CR Max scanner equip with numberous of actuational test items for covering all available vehicle control modules, no longer only do simple light test or window test like other scanners, performs hardware modules test and software control modules test for checking car units or new updated control moduels work well or not after maintenance/ repair/ re-installation/ control system updated (Example for Benz- Roller Sun Blind test; Backup Camera test ;Self-test; EPB test; Transport Mode test;Boost Pressure Positioner test; Fuel Pump test; AND MORE!!).(Warm tip: The available test items are based on control modules your car has)
- ECU CODING+ BATTERY REGISTRATION- Powerful ECU Coding service for BMW/MINI/RollsRoyce / Audi/VW/Seat/Skoda/Bentley/Bugatti/Lamborghini, Improves Engine Power Performance and Optimizes Fuel Efficiency and Match New Hardware Unit to car and Customized a comfortable Driving Modes and Fixes & Updates Original Software Bug. The battery test function for checking car battery health, perform battery reset (BMS ) for replacing a damaged or aging car battery with a new one and register new battery to car ECU
- Scanner POR V2.0 with all obd2 services
- Do the scanning for engine
- Support OBDII/EOBD Ten Modes of Operation
- 【Designed for Most Mercedes-Benz, Sprinter and Smart from 1996-2023】As every car model of Benz has its-owned specific car system and ECUs, not all models are equipped with a complete vehicle ECU, which may cause the scanner to be unable to perform all listed reset services on some models, or even completely incompatible. Like For Sprinter's newer models, it support diagnostic functions only, lacking support for specialized service functions.. So please tell us the car's VIN and required service before purchase for compatibility check. You may also refer to the instructions in the eighth image of the main product photos to perform your inquiry.
- 【Up to 38 Reset Services】MB V3.0 2026 Version diagnostic tool performs Up to 38 maintenance services - Oil Rest , SAS, EPB, ETC, D-P-F, TPMS, ABS, Suspension, Air Conditioner, Head Lamp, Body Stability, Engine Control, Seat, Fuel Pump, Air-Filter, Engine Idle, Door, Im-mo-bilizer, Injector Coding, Transmission Control, Miscellaneous, Adblue, BMS, Cluth, Water Pump, NOxSensor, Rain/Light Sensor, Start/Stop, Radar/Camera, Cylinder Shutoff Test, Speed Limit Assist, Control Unit Reset, Oxygen Sensor, Seat Belt, Cruise Control System, Turbocharger, Crankshaft, Language Setting and etc. (Tips: Please update the software after receiving the product to obtain new service functions)
- 【OE-Level All System OBD2 Scanner】iCarsoft MB V3.0 (2026 Version) diagnostic scanner offers comprehensive OBDII services, allowing you to quickly scan all systems, including the Engine, ABS, SAS, SRS, TPMS, TCM, Fuel Pump System, ESP, EPB, EPS, Suspension, SCM, Adaptive Systems, and more. It supports functions such as reading and erasing codes, checking I/M readiness, viewing freeze frame data, performing O2 sensor tests, conducting on-board monitoring, testing the evap system, auto VIN retrieval, and reading both generic and specific codes, as well as DTCs and battery tests.
- 【Bidirectional Scan Tool】iCarsoft MB V3.0 (2026 Version) Bidirectional scanner supports activate or control a vehicle system or component, allows commanding cars’ modules and receiving info from the ECU to perform active tests on individual components, including EVAP/ABS Motor Pump/Windows/Sunroof and more, to pinpoint fault causes & resolve issues,and allows you to re-learn certain components after making repairs or replacement.
- 【Real Time Record & Graph View】iCarsoft MB V3.0 (2026 Version) can automatically record vehicle text history and identify vehicle information. Preserve real-time data information. View & Graph Live Data. Support Data Review and Print. Multi-language: English, German, Dutch, Spanish, French and so on. We promise to offer Lifetime updates (Lifetime free Update via PC), and confidence in products. We also provide 1 year warranty + extra lifetime hardware free repair if you need it in the future. We prioritize user experience & strive to meet your expectations. Please do feel free to reach out to us if you have any question or problem about the usage, our tech team will service you in time.
This product presentation was made with AAWP plugin.
Last update on 2026-05-11 / Affiliate links / Images from Amazon Product Advertising API