What 399 owners told NHTSA about the 2013 Toyota Prius Phev

Year/Make/Model: 2013 Toyota Prius • Component: Brake Booster Assembly with Master Cylinder (Part #47070-47060) Description of the Defect: After approximately 30–40 minutes of driving, my dashboard illuminates with the Brake, ABS, and VSC warning lights simultaneously. The brake pedal becomes inconsistent and requires significantly more effort to stop the vehicle. This is a known internal fluid leak within the brake booster assembly that causes the accumulator pump to run continuously and ultimately reduces braking performance — a direct safety hazard. Why This Requires Federal Attention: This is not an isolated incident. Hundreds of 2013 Prius owners have reported identical symptoms, with associated diagnostic trouble codes C1391, C1252, C1256, and C1253. Toyota acknowledged this defect by issuing Technical Service Bulletin TSB-0089-20 and a Customer Support Program (ZJB) providing limited extended warranty coverage. However, that program was not well publicized . I was never informed as a vehicle owner . And it has now expired, leaving thousands of owners with a dangerous defect and repair bills costing thousands . A safety defect of this magnitude — one that can result in sudden, significant loss of braking ability — should not have an expiration date on its remedy. Toyota has not issued a mandatory recall, and owners continue to unknowingly drive vehicles with compromised brake systems. Requested Action: I respectfully urge NHTSA to: 1.Open a formal investigation into this defect across all affected 2013–2015 Toyota Prius model years 2.Require Toyota to issue a mandatory safety recall 3.Compel Toyota to cover repair costs for all affected owners regardless of mileage or age of vehicle

NHTSA ODI 11736173

My 2013 Toyota Prius with only 99,000 miles is experiencing a brake system failure. The brake warning light, ABS light, and traction control light all illuminate. The brake actuator pump runs every 10 seconds, indicating loss of hydraulic pressure. Safety concern: This issue affects braking performance and disables ABS and traction control, creating a safety hazard, especially in emergency braking situations. This appears to be a known issue with Toyota Prius brake actuator assemblies. Toyota previously issued a warranty extension, but my vehicle is now outside the time window despite low mileage. This failure occurred prematurely and without warning. What happened: The warning lights temporarily went off after adding brake fluid but returned shortly after. The pump continues to cycle frequently, indicating system failure.

NHTSA ODI 11730517

The hybrid braking systems on Toyota Prius' manufactured from 2010-2015 had a serious failure of the hybrid braking system that had additional long term warranties to repair, but never recalled in order to save the money from a total recall. The Sloan Toyota dealership in Glenside knew before I purchased the 2013 Toyota Prius I purchased that a serious brake system failure was very probable with my car but failed to tell me. If they did, i would not have purchased the car. I had the 5000 mile oil change in early August and three days later after the service and a clear 25 point inspection, and the system failed. I want full reimbursement or just pay for the repair.

NHTSA ODI 11690340

Around May 2025, the brake booster and pump in the car stopped working. There was no clear warning lamp or indicator prior to it failing. While driving on the highway, the part stopped working and significantly changed the car's braking power. Rather than smoothly braking as it did before, the car's brakes have significantly less braking power. The defective part also affects the car's ABS system, making the car unsafe if a sudden stop were required as the brakes will lock up and the car will lose grip on the road and start skidding. Significantly longer braking distances is needed and it's not clear the car would be able to safely stop at a short distance in the event of an emergency. It's a miracle we didn't get into any accidents when the part suddenly failed. There is a significant risk that failure of this part will be the cause of a car accident when the car suddenly no longer brakes how the driver is used to. Toyota has previously offered an extended warranty on the part, but the part did not fail until shortly after the warranty expired. The car has been within my family since it was originally put into service and none of the owners were ever notified that the part could be replaced or even fail in such a manner. The problem has been confirmed by a dealer but they have only offered to fix it at a significant cost. The vehicle does not feel safe to drive. Warning lights only appeared after the part failed but they weren't particularly helpful in diagnosing the problem in the moment because 4 different lights turned on all at once.

NHTSA ODI 11682002

While driving on Highway 316E on March 31, 2022, at approximately 10am, at some point, as traffic started to slow down and I applied my brakes I was dumbfounded when my car would not stop! It was frightening, as I watched my car get closer and closer to the large truck in front of it. I kept applying the brake and then pumping the brake. The brakes kept failing and had no pressure or tension in them to stop the car. The brake pedal was flat on the floor. But, thanks to a sufficient distance between my car and the truck in front of it, it rolled to a stop just short of crashing into the back of said truck by an inch or two. Sometime in October of 2024 , I spoke with a Service Rep at Marietta Toyota about a whizzing sound that appeared to be coming from under the hood on the driver’s side. This sound would occur while I was driving and even when I turned the car off. It would continue making this whizzing sound sometimes for as long as 45 minutes after the ignition was turned off. I took the car back to Marietta Toyota and the service rep said the problem was related to the weather. On December 24, 2024, at around 11:00am EST, I parked my car in the parking lot in front of a print shop. The weather was clear, and the pavement was dry as I pulled my car into a clean, unfettered spot. Upon returning to my car, I could see a fresh puddle under the front passenger side. I ran my finger across the liquid that presented itself as a clean, thin oil that was as smooth as silk. It was odorless and sat in a pristine area looking freshly run out from the underside of my car. On February 27, 2025, when driving in the middle lane on Highway I-20 West, the ABS warning lights came on my dashboard screen along with the image of a skidding car. I was frozen with fear and did not know what would happen next. I would have to cross over multiple lanes to exit off Highway 1-20. I put on hazard lights and drove at 25-35 mph. Took car in for diagnostic and repair.

NHTSA ODI 11674582

The brake booster assembly (part number 47070-47060) on my 2013 Toyota Prius has failed. This component is critical to the proper functioning of the braking system. It is currently still installed in the vehicle and available for inspection upon request. As a result of the failure, the ABS warning light, traction control light, and brake warning light are all illuminated on the dashboard. The braking performance has noticeably declined — the pedal feels inconsistent and at times unresponsive. This has created a significant safety risk while driving, especially during sudden stops or in wet conditions, as it compromises the vehicle's ability to brake efficiently and predictably. The issue has been confirmed by a Toyota dealer (or independent mechanic if that’s the case — feel free to change this line accordingly). The dealer diagnosed the issue as a failure of the brake booster assembly, which aligns with known failures reported by many other 3rd-generation Prius owners. The vehicle has not been involved in an accident, and has not been inspected by the police or insurance representatives. Toyota previously issued a Customer Support Program (CSP ZJB or ZG1) covering this part, but it has since expired. I only recently began experiencing symptoms and was unaware of the CSP until after contacting Toyota. Prior to the warning lights, I experienced intermittent symptoms such as a soft or delayed brake pedal, and an unusual sound from the brake system when the vehicle was turned off. The warning lights first appeared around [insert approximate mileage or date here], and have remained illuminated since then. Given the safety-critical nature of this component and the known defect history, I am requesting assistance from Toyota in the form of goodwill coverage or reimbursement, and would like this issue escalated for further review.

NHTSA ODI 11653660

Inverter and brake booster

NHTSA ODI 11640958

While driving on the highway, ABS, "Brake"/E-Brake, Traction Control Lights lit up all at the same time out of the blue. No prior engine lights/codes before this incident. During that trip, brakes felt more difficult to press, loss all brake regeneration for the hybrid battery but was still about to brake for that entire 100 miles trip. As of now, the car is still able to brake but it looks like it's just primarily using the mechanical brakes all the time now. It still has that different brake feel compared to when before all those engine lights went on. Regenerative braking is no longer working. Brought the car to the shop at was given the error codes C1391 and C2315.

NHTSA ODI 11597772

I was driving and suddenly the car started beeping and the brake, e-brake, abs, and traction control lights came on. As soon as I found an opportunity I tried to brake but the car would not stop and the brake pedal became really hard. I had swerve to avoid hitting cars in front of me. It was the scariest moment of my life. I shifted the car from D to B to use the engine braking. I finally was able to slow down enough to turn right on a side Street and pushed on the brake pedal with all my strength and it finally came to a stop. I was lucky I didn't have a collision or strike a pedestrian, that I also drive defensively and leave enough space in front of me, and that I was on a surface street and not on a freeway which I frequently use because if I was I would have surely crashed. This is NOT right. Brakes should NOT suddenly fail! Under any circumstances. It was confirmed by a mechanic that it's the BRAKE BOOSTER AND BRAKE BOOSTER PUMP ASSEMBLIES had failed and had the following codes C1252, C1253, and C1256 were found. The same issue and codes reported in tsb pol18-03.

NHTSA ODI 11595842

The contact owns a 2013 Toyota Prius. The contact stated while driving approximately 5 to 10 MPH, the vehicle stalled. The contact was able to restart the vehicle, but the failure persisted. There were no warning lights illuminated. The vehicle was taken to an independent mechanic, who replaced the battery on two occasions, but the failure reoccurred. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 173,699.

NHTSA ODI 11594995

Took vehicle for state inspection on 2/13/2024, failed inspection because of brake warning lights. Slip indicator, Electronically controlled brake warning light, Brake warning light, Anti-lock brake system, and Low tire pressure lights are all on. I have looked into it, and it seems the brake actuator/booster used to be under warranty, however since this is a 2013 in 2024 with almost 210k miles on it, it no longer qualifies for the original recall.

NHTSA ODI 11583435

The contact owns a 2013 Toyota Prius. The contact stated that after several days of torrential rainfall, the contact noticed there was water in the tire and 12-volt battery compartment. After having a routine oil change at an independent mechanic, while the contact was driving, the vehicle lost power steering functionality. The power steering warning light illuminated after the failure. The driver was able to restart the vehicle and pull over to the side of the road. The contact called Roadside Assistance and was informed that there was a code for the hybrid battery system that needed to be checked. The contact noticed that water might have entered through the rear passenger’s side brake light. The contact removed the water with a sump pump. The vehicle was towed to an independent mechanic who was unable to assist. The vehicle was towed to the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 119,000.

NHTSA ODI 11581365

ABS Brake Warning Light On-stays on-this just happened within last 2 weeks. Not sure on safety measures but unsure if I keep driving it the brakes will just give out. The problem has been confirmed and seen by Tire Max but no diagnostic tests were ran. The just saw the light was on. No one has inspected the vehicle component by the manufacturer, police, or insurance company. No warning lamps prior to the problem but the ABC Warning light stays on while cranked and it first appeared about 2 weeks ago. I do want to add that a similiar recall or warranty had been put out by Toyota on Sept 4th 2020-(T-SB-0089-20) for 2012-2014 Prius V & C stating: "Some 2012-2014 model year Prius V hybrid vehicles may exhibit a condition where the brake, ABS, and/or TRAC warning lights are on and/or a Check VSC message displays. Diagnostic Trouble Codes (DTCS) C1391, C1252, C1256, C1253 may be stored. This condition may be caused by a small internal brake fluid leak inside the brake booster assembly with master cylinder. The warranty was for Prius V or C but my Prius(no V or C) has been affected with the same issue but Toyota will not honor this warranty or recall due to the problem not showing as specific to my vin#. So I am reporting this problem so it can be submitted that there is a similar problem with my Prius as well as the Prius V or C so others could submit their problem as well. I cannot afford to fix this myself. I need Toyota to back up their cars.

NHTSA ODI 11569416

Brake system failure. Traction control light, brake light, abs light, and brake system warning light all lit up on dash. The regenerative braking is no longer working or charging battery. Obvious loss of stopping power. Does not feel safe to drive at all. Toyota wants $3,000-$4,000 for the repair. Toyota should be held liable for these failures causing crashes and potential fatalities. This should already be a recall.

NHTSA ODI 11557284

Check hybrid system. Stop the vehicle in a safe place. About 90,000 miles 2013 Prius bought brand new and regular all dealer maintenance completed. Lost power on the road and very slow pickup. Not drivable and very unsafe car. Thanks.

NHTSA ODI 11555751

Driving down the road and the brake light, ABS light, VSC light and a ! with a circle around turned on in the dash. My breaks almost stopped working I almost hit the car in front of me. I've been try to figure out what's wrong and keep hearing this is a brake booster/ actuator problem. I have parked the car due to the brakes barley working.

NHTSA ODI 11456227

The contact owns a 2013 Toyota Prius. The contact stated that the hazard lights would activate inadvertently and were not able to be turned off as designed. The vehicle was taken to a local dealer but was not yet diagnosed or repaired. The manufacturer was informed of the failure but offered no assistance. The failure mileage was approximately 124,000

NHTSA ODI 11448896

We have been experiencing on multiple occasions car while driving will slow down, hybrid safety warning light on dashboard will turn on and tell us we have to go to a safe area and turn off car. The car will automatically shut down like a golf cart feeling. We have had near incidents were we have almost crashed. The car now will not go past 35 miles. We brought the car to a Toyota Dealership because we noticed their was a software update recall. When we left the car repeated the warning again about 5 minutes leaving the dealership. The dealership has not helped us and refuses to fix car. We mentioned to them that there have been many complaints regarding the same issue.

NHTSA ODI 11436051

The car has been stopping on me anytime I go 35 mph or more. The check hybrid system warning light appears then the far shuts down.I have been having this problem for over a year now after Toyota techs have performed all other software updates.I have replaced hybrid battery 12 v battery both water pumps sensors along with a low mile engine.my year car is on all recall list except the inverter replacement which is the problem.I have spent several thousand dollars on a no end issue .

NHTSA ODI 11434349

I was loving my Prius until yesterday June 9, 2021 when I took it to Toyota of Riverhead, NY to have my Hazard lights checked because they would not shut off. I was told that the technician found ABS actuator shorting out causing the hazards to not go off. The replacement would be $2664. I had the fuse removed because it was causing my battery to die with the hazard lights being on. I was also advised by Tonianne Rempel (service advisor) that Toyota was familiar with this problem with 2013 Prius. I have a problem with Toyota knowing that there is a problem with the hazards for this is potentially dangerous for it makes your battery die and leaving the owner stranded. This should have been a recall. I had removed the fuse so now I have no hazards or directionals leaving me to use hand signals. Which is extremely dangerous for other drivers do not look for driver using hand signals. This embarrassing for Toyota drivers seeing that somebody driving a Toyota is using hand signals because the directionals don’t function. Toyota should have done a recall knowing that this hazardous situation exists. I am asking Toyota to pay for this repair. I do not have $2664 to repair this hazardous situation that should have been addressed by Toyota and leaving me in a very dangerous situation without hazards or directionals.

NHTSA ODI 11422940

TL* THE CONTACT OWNS A 2013 TOYOTA PRIUS. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE VEHICLE LOSS MOTIVE POWER AND STALLED WITHOUT WARNING. THE VEHICLE WAS RESTARTED AND OPERATED AS DESIGNED. THE VEHICLE WAS TAKEN TO HAMER TOYOTA (11041 SEPULVEDA BLVD, MISSION HILLS, CA 91345) HOWEVER, THE MECHANIC WAS UNABLE TO DETERMINE CAUSE OF THE FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE CONTACT WAS INFORMED THAT THE VEHICLE WAS PREVIOUSLY SERVICED UNDER NHTSA CAMPAIGN NUMBER: 18V684000 (HYBRID PROPULSION SYSTEM). THE CONTACT STATED THAT THE VEHICLE HAD EXPERIENCED THE SAME FAILURE LISTED IN THE RECALL, AFTER THE REMEDY WAS COMPLETED. THE FAILURE MILEAGE WAS 65,000.

NHTSA ODI 11414276

I KEEP GETTING A P0136 BANK 1 SENSOR 2 ERROR CODE. TOOK IT TO SEVERAL MECHANICS AND THEY SWITCHED THE 02 CENSOR (DOWNSTREAM). ALSO SHOWS THAT BANK 1 SENSOR 2 HAS 0% VOLTAGE. UNPLUGGED THE DOWNSTREAM 02 SENSOR AND GOT A READING BUT NO READING WHEN PLUGGED IN. CHECKED WIRING HARNESS TO ECM AND EVERYTHING WAS FINE. BOTH MECHANICS HAVE DETERMINED THAT THE ISSUE IS WITH THE ECM. MY VEHICLE HAS ROUGHLY ABOUT 70K MILES ON IT. MY CAR WILL NOT PASS SMOG UNTIL THIS IS FIXED. MECHANIC IS RECOMMENDING REFLASHING ECM OR REPLACING IT. P0136 COMES UP AS PENDING AND WILL STAY PERMANENT ON THE SECOND DRIVE CYCLE. CHECK ENGINE LIGHT STAYS ON.

NHTSA ODI 11377970

MY TOYOTA PRIUS WAS INVOLVED IN A HIT RUN ACCIDENT. YARK COLLISION COMPLETED WORK ON VEHICLE. WHEN PICKING UP CAR FROM YARK MY CAR WOULD NOT START SPOKE WITH ONE OF THE MECHANIC HE SAID MY BATTERY DIED AND I EXPLAINED TO THEM I HAD NO ISSUES ,PRIOR TO BRINGING MY CAR TO YARK I HAD JUST HAD DIAGNOSTIC TEST DONE AT TOYOTA. VEHICLE SAT AT MY RESIDENCE OVER NIGHT AND VEHICLE HAD DIED AGAIN. I CONTACTED YARK TOLD THEM I WAS BRINGING BATTERY IN FOR THEM TO CHARGE BECAUSE I WAS NOT SURE AS TO WHAT WAS GOING ON SINCE WE HAD ALREADY REPLACED BATTERY. VEHICLE ALSO HAD MY SKID PLATE IN TRUNK PRIOR TO DROP OFF AND NOW I AM HAVING ELECTRICAL ISSUES MY HORN NOW DOES NOT WORK AND I HAVE CHILDREN .I DID NOT RECEIVE MY CAR UNTIL 1 MONTH AND HALF DUE TO INSURANCE NOT GETTING BACK TO US . VEHICLE HAS BEEN NON DRIVABLE SINCE PICK UP.

NHTSA ODI 11374173

THE CAR GAVE A TRIANGLE OF DEATH AND LOOKED IT UP IF ANY RECALLS HAD BEEN MADE THAT COULD POSSIBLE CAUSE THIS ISSUE AND THERE WAS 1 THAT CALLED FOR AN UPDATE TO THE SYSTEM WHICH I HAD DONE AND THEY HAD TOLD ME IF IT DIDN'T TAKE THEY WOULD HAVE TO DO THE INVERTOR WHICH WAS APART OF THE RECALL. A WEEK AFTER THE SYSTEM UPDATE THE SAME ISSUE AROSE AND THEY REFUSED TO REPLACE THE INVERTOR WHICH DRAINED THE HYBRID BATTERY AND RUINED IT ALSO . THIS EFFECTS THE DRIVING ABILITY AND CAUSES THE CAR TO SHUT DOWN THE LIGHTS TO NOT WORK . IT CAN STALE AT ANY GIVEN TIME AND WILL NOT HAVE POWER TO CONTINUE

NHTSA ODI 11352789

I AM HAVING PROBLEMS WITH RODENTS GETTING INTO MY CAR. I FEAR THAT THEY ARE CHEWING ON ELECTRICAL WIRING AND THERE IS POSSIBLE DISTRACTION TO THE DRIVER. WHEN I WAS DRIVING (CAR WAS MOVING) A MOUSE CRAWLED UP ON MY SHOULDER. THESE PROBLEMS APPEAR TO BE A PROBLEM WITH THIS MODEL TOYOTA AND COULD CAUSE A DISTRACTION TO THE DRIVER AND A DRIVING ISSUE WITH WIRING.

NHTSA ODI 11352266