This is a 2012 Toyota Prius V that was purchased and driven in [XXX] and had 93,000 miles on it. The car drove normally the night before, and was parked in a protected parking lot.When the car was driven the next morning, it made a horrible metal scraping sound and would not move. Upon inspection, it was found the the entire wheel had fallen off the car. It was towed on a flat bed trunk to a Toyota dealership where it was found that the drivers side, rear axel beam had corroded through, causing the wheel to fall off. The right side rear axel beam was "one pothole away" from falling off. The car had been up a lift several months earlier, since my daughter had driven over something and had scraped off the oil pan protector (no other damage), and the corrosion was not noted at that time. The tow trunk driver and Toyota noted that they had seen several cars with this type of corrosion and damage. This would have been a dangerous incident if the wheel had fallen off when she was driving 50 MPH on a freeway. If this has been a noted pattern in the 2012 Prius, a recall may be recommended for safety reasons. ***See video link*** [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The worst 2012 Toyota Prius V problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes133
- Engine37
- Electrical24
- Acceleration15
- Driver assistance13
- Steering11
- Airbags8
- Fuel system8
- Transmission7
- Body5
- Lights3
- Visibility3
- Wheels3
- Seats2
- Suspension2
- Seat belts1
Specific symptoms reported on the 2012 Toyota Prius V
ABS 58Brake failure 25Stalling 17Warning lights 10Check engine light 8Oil consumption 6Headlights 5Jerking 5Loss of power 5
Trouble codes owners of the 2012 Toyota Prius V mention
C1391 27C1252 2C1256 2
Recalls 3
Hybrid propulsion system
- What is wrong
- Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2010-2014 Toyota Prius and 2012-2014 Toyota Prius V vehicles. Excessive voltage in the Intelligent Power Module (IPM) within the inverter may cause the hybrid system to shut down, causing the vehicle to stall while being driven.
- Risk
- If the hybrid system shuts down unexpectedly, it can increase the risk of a crash.
- Remedy
- Toyota will notify owners, and dealers will update the software for the motor/generator control electronic control unit (ECU) and the hybrid control ECU as necessary, free of charge. The recall began January 22, 2019. Owners may contact Toyota customer service at 1‑888‑270‑9371. Toyota's number for this recall is J0V. Note: The software updates in this recall are needed even if the vehicle had the software previously updated under recalls 14V‑053 or 15V‑449.
Recall number 18V684000 · Recall details
Hybrid propulsion system: inverter
- What is wrong
- Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain model year 2012-2014 Prius V vehicles manufactured August 22, 2011, to June 30, 2014. A component within the hybrid inverter assembly may overheat, causing the hybrid system to reduce output power allowing the vehicle to only drive a short distance. In some circumstances, the hybrid system may shut down causing the vehicle to stop while being driven.
- Risk
- The vehicle may enter a fail-safe/limp-home mode that limits the drivability of the vehicle. The hybrid system could also shut down completely resulting in a vehicle stall, increasing the risk of a crash.
- Remedy
- Toyota will notify owners, and dealers will update the software for the motor/generator control electronic control unti (ECU) and the hybrid control ECU, free of charge. The recall began on July 30, 2015. Owners may contact Toyota customer service at 1‑888‑270‑9371.
Recall number 15V449000 · Recall details
Air bags: frontal: sensor/control module-inactive
- What is wrong
- Southeast Toyota Distributors, LLC (SET) is recalling certain models interspersed through model years 2009 through 2013 as follows: model year 2009-2012 Tacoma, 4Runner, Camry, Camry Hybrid, Prius, and RAV4; model year 2009-2010 Avalon, FJ Cruiser, and Highlander Hybrid; model year 2010-2013 model year Corolla, Sienna and Tundra; model year 2009-2013 Highlander and Venza; model year 2012 Prius V; and model year 2010-2012 Sequoia. During modification by SET to include accessories such as leather seat covers, seat heaters or headrest DVD systems, these vehicles may not have had the passenger seat occupant sensing system calibration tested. Without passing the calibration test, the occupant sensing system may not operate as designed.
- Risk
- If the front passenger seat occupant sensing system is out of calibration, the front passenger airbags may not deploy or they may deploy inappropriately for the passenger's size and position. This could increase the risk of personal injury during the event of a vehicle crash necessitating airbag deployment.
- Remedy
- Southeast Toyota will notify owners, and dealers will test the sensitivity of the occupant detection sensors, and recalibrate them as necessary. The recall began on March 21, 2013. Owners may contact Southeast Toyota at 1‑800‑301‑6859.
Recall number 13V014000 · Recall details
See all 3 recalls for the 2012 Toyota Prius V
Defect investigations
Brake Actuator Valve Wear
The Office of Defects Investigation (ODI) has received a petition dated September 19, 2023 from the owner of a 2012 Toyota Prius V requesting that ODI reevaluate its decision to deny DP19-004. In the letter, the petitioner reported experiencing an unexpected and complete loss of brake power while driving, accompanied by multiple dashboard warning lights. This petition is based on the petitioner's direct experience and assessment that ODI closed DP19-004 because its prompting petition was withdrawn by that petitioner. ODI will review the work conducted during DP19-004 and a review of any additional related complaints and crashes via a new defect petition The petition and related materials can be reviewed at under the following ODI number:11553736.
DP23005
Technical service bulletins for the 2012 Toyota Prius V 496
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Obsolete notice
- This bulletin includes basic procedures for performing a rescue charge on Ni-MH high voltage (HV) batteries
- Condition in which a musty odor is present
- Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical...
- To prevent brake rotor rust from forming during transportation and storage, wheel film will be used...
- The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix...
- Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal...
- Vehicles may occasionally be subjected to contamination by airborne iron particles shed from railroad...
- Condition in which a musty odor is present
- Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal...
2012 Toyota Prius V fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 1.8L 4‑cyl Hybrid | FWD | 43 | 39 | 41 |
What 2012 Toyota Prius V owners say
Most recent owner complaints, unedited.
The contact owns a 2012 Toyota Prius. The contact stated that while driving 65 MPH and depressing the brake pedal there was a buzzing sound coming from the vehicle and the brake warning light illuminated. The contact stated that after inspecting the vehicle, the brake fluid level was very low. The vehicle was taken to a service center where it was diagnosed and DTC: C1391; was retrieved. The contact was informed that a leak in the brake accumulator had caused the brake master cylinder and hydraulic power brake accumulator to fail and needed to be replaced. The vehicle was scheduled to be repaired by the service center. The manufacturer was made aware of the failure via telephone. The contact stated that the manufacturer was aware of the failure and offered an extended warranty to cover the repair. However, the part needed to be replaced. The failure mileage was approximately 81,239.
The contact owns a 2012 Toyota Prius V. The contact stated that while driving 65 MPH, brake fluid was leaking from the vehicle. While driving over 45 MPH, the brake pedal became firm, requiring the driver to exert extra force while depressing the brake pedal; the brakes failed to respond as intended. Additionally, a burning and toxic odor was present during the failure. Multiple warning lights illuminated on the instrument cluster, including the ABS system, parking brake, brake malfunction, and electronic stability warning lights. In addition, the automotive brake system, brake pump, and pressure warning messages were displayed. The vehicle was taken to a local dealer, where it was diagnosed with a failed brake booster assembly after inspection. The dealer determined that the brake booster assembly needed to be replaced. The contact associated the failure with Customer Support Program: 20TE07. The contact was referred to the federal safety agency Hotline by a lawyer, and the contact had found a class action lawsuit related to the failure. The failure mileage was approximately 187,000.
2012 Toyota Prius v with 89,662 miles. Multiple brake warning lights illuminated, and the vehicle stored diagnostic trouble code C1391, “Abnormal Leak in Accumulator.” The brake booster/accumulator pump is also cycling about every 13 seconds, even when the brake pedal is not being applied. The vehicle and components are available for inspection. My safety concern is that this involves a critical braking-system component. When the warning lights are on, regenerative braking is disabled, and braking behavior changes. I am concerned that continued deterioration could reduce braking performance or result in loss of brake assist. The issue has not yet been formally diagnosed by a Toyota dealer. I scanned the vehicle with a diagnostic scan tool, which currently shows C1391. I also contacted my independent repair shop, which recommended that Toyota diagnose the vehicle because this code is associated with the brake booster/booster pump failure previously addressed by Toyota Customer Support Program 20TE07. The vehicle has not yet been inspected by Toyota, police, insurance, or another manufacturer representative. A Toyota corporate case has been opened and escalated. There were no known brake warning lights before this incident. The problem first became apparent when multiple brake warning lights illuminated. Afterward, I noticed the brake booster pump cycling unusually often. Toyota previously identified C1391 as a qualifying code under 20TE07 for certain 2012–2014 Prius v brake booster/booster pump failures. My vehicle is outside the time-based coverage period despite relatively low mileage. I am reporting this because I am concerned this safety-related failure may continue occurring in similarly aged vehicles.
Brake actuator assembly failure on a vehicle with 99,818 miles. Whirring sound when braking followed by lighting of several brake alert lights on dash including PCS and ABS and others. The whirring noise has occured for several weeks, but the light indicators happened on 6/28/26. Toyota has an acknowledged Customer Support Program (20TE07) for this exact failure on this exact and Toyota declined to cover the repair. This vehicle is 14 years old but has well under 150k miles and Toyota will not honor claim though they clearly are aware of the safety hazard.
Driving down the highway, the engine suddenly threw a rod, causing a terrible jolt, after which the engine burst into flames. There had been no warning lights.
The ABS system has failed. All brake related warning lights have appeared on the dash board and the ABS no longer works. The car will brake for now, but the pedal is mushy. The issue was diagnosed by a dealer. The diagnosis from the dealer, based on diagnostic trouble codes they did not provide, is that brake fluid is leaking in the master cylinder and brake booster. The recommendation is to have both the master cylinder and booster replaced. This vehicle has 143,000 miles on it. No accidents have occurred as a result of the brakes yet but how long before the brakes ultimately fail is unknown.
ABS, brake, and traction control lights, all illuminated at once on the dashboard. Inspection found DTC C1391 indicating the accumulator is leaking or failing to hold pressure correctly. We are advised that the braking system performance will decline, eventually failing. An very expensive repair is required and Toyota apparently has a shortage of the parts required. We cannot drive the vehicle given the potential of braking failure and cannot get it repaired in a timely manner for lack of Toyota parts.
The contact owns a 2012 Toyota Prius V. The contact stated that while driving at an undisclosed speed, the brake master cylinder was constantly cycling. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic to be diagnosed or repaired. Most recently, while the vehicle was turned off, the brake master cylinder was cycling. The contact stated that while the keys were in his hands and standing several feet away from the vehicle, the brakes started cycling. The manufacturer was notified of the failure but offered no assistance. The approximate failure mileage was 140,000.
The power assist braking system failed while I was driving in the rain. I was approaching a stoplight and I had to push down a lot harder and farther than I typically have to in order to stop. Luckily I was not going that fast and there were no cars ahead of me, but I stopped beyond where I had intended at a busy intersection. No warning lamps or messages had been illuminated prior to this happening. After the failure, the Brake system, ABS, and SLIP indicator lights were on and remained on when the car was restarted. An independent service center used a scan tool and found code C1391 stored in memory, indicating that the brake booster is unable to hold pressure due to an internal leak. The vehicle has not yet been inspected by the manufacturer, police or insurance, but can be available upon request.
Compare the 2012 Toyota Prius V
Other model years
Questions about the 2012 Toyota Prius V
Is the 2012 Toyota Prius V reliable?
Owners have filed 219 complaints about the 2012 Toyota Prius V, 9.1 times a typical Prius V model year. It is one of the years we flag to avoid.
What is the 2012 Toyota Prius V year score?
The 2012 Toyota Prius V scores 5 out of 100 (poor). The score compares it with the other model years of the Toyota Prius V: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2012 Toyota Prius V?
Brakes, with 133 complaints, typically around 84,000 miles. Next is engine (37).
How many recalls does the 2012 Toyota Prius V have?
3 recalls, covering hybrid propulsion system and air bags.
What year does the Toyota Prius V have bad brakes?
The Toyota Prius V model years with the most brakes complaints are 2012 (133 complaints), 2013 (68 complaints) and 2014 (44 complaints).
What gas mileage does the 2012 Toyota Prius V get?
Official estimates for the 2012 Toyota Prius V range from 41 mpg combined. The most efficient version (1.8L 4-cyl hybrid, FWD) gets 43 city and 39 highway.
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