*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Exterior lighting
The low-beam headlight bulbs on my 2010 Toyota Prius keep burning out, about every [6 months or less]. Since I have owned the vehicle I have replaced them too many times to count, on both sides, but twice as often on the drivers side. The most recent failure was on XXX, my driver low beam failed while I was driving at night on a county highway in heavy rain. Visibility was already poor, and I was stopped by law enforcement because of the burned-out headlight. I was given a warning to get it fxed. Warnings from the police has happened twice in the last couple years. This is a known problem on 2010-2011 Prius models. Toyota acknowledged it in a technical service bulletin and addressed it…
Jul 31, 2026Service brakes
Subject: Vehicle Safety Defect Complaint / Request for Investigation Review Vehicle: 2010 Toyota Prius VIN: [XXX] Component: Electronic Brake Booster / Pressure Accumulator Assembly Dear Administrator, I am writing to formally report a critical safety defect in my 2010 Toyota Prius regarding the electronic brake booster and accumulator pump assembly. This component exhibits classic failure symptomsâspecifically a distinct puffing, ticking, and pressure-loss noise directly from the brake pedal mechanismâwhich points to internal nitrogen or hydraulic pressure leakage. This component was previously the subject of Toyotaâs Customer Support Program / Safety Recall (Campaign ZJB / D0H) due…
Aug 20, 2026Service brakes
Component failed: Brake actuator and accumulator on a 2010 Toyota Prius. It is available for inspection upon request. Safety: ABS, traction, and brake lights turned on suddenly in the middle of rush-hour traffic, followed by a spongey, hard-to-press pedal. Braking distance and efficiency was greatly impacted, and driving to a safe turn-out was extremely dangerous as I feared the brakes would give out entirely at any moment. The problem has been reproduced and confirmed by a dealership. UNKNOWN. Requested an inspection by the manufacturer but their "Customer Support Program" for the brake actuator and accumulator expired 10 years after the car's production date. After speaking to both the…
Aug 16, 2026Service brakes
To Whom It May Concern, I am writing to formally complain about the way Toyota has handled the problems with my 2010 Toyota Prius and my repeated requests for assistance. I have been a loyal Toyota customer and have purchased two new Toyota vehicles because I trusted Toyota's quality and expected good customer service. Unfortunately, after years of contacting Toyota, I have repeatedly been given the runaround without receiving a meaningful resolution. I am now facing a serious and expensive brake system problem. The vehicle requires replacement of the brake booster with master cylinder and the brake booster vacuum pump, with an estimated repair cost of approximately $4,000. This is a major…
Mar 14, 2020Service brakes
ABS light came on 6 months ago as well as ((!)) light. As soon as those lights came on, the brakes had an increased stopping distance and it became harder to get the car to come to a complete stop. I have seen a few Prius owners in my area also having the same problem with their Prius. For my car, the ABS light would come on, then turn off for 300 or so miles, then turn back on and stay on for about 300 miles. That has lasted for 6 months. I had almost gotten in an accident yesterday after getting brake lines fixed for 4th time, and we determine the actuator and accumulator are both bad. I have also seen a lot of Prius owners with the same code. Where I am at, my shop is quoting me $2300…
Jun 3, 2026Electrical system › 12v/24v/48v battery
The contact owns a 2010 Toyota Prius. The contact stated that while driving at an undisclosed speed, a strong and unusual odor was detected inside the vehicle with no warning lights illuminated. The contact further stated that the following day, upon entering the vehicle, both the contact and the contactâs spouse experienced headaches, nausea, and cognitive discomfort. Concerned about possible exposure to harmful fumes, the contact inspected the vehicle and determined that the vehicleâs battery appeared to be inoperable. The vehicle was taken to a dealer. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The contact expressed concern that the…
May 5, 2026 · 75,000 milesService brakes
My 2010 Prius has experienced the following error codes: C12341 and C1391, prompting the dealer to recommend replacing the brake booster assembly and master cylinder for $3938.89. This is a known issue with this vehicle and a Customer Support Program (CSP) was issued back in 2018, stating that if this vehicle displayed these codes, the repairs would be at no charge to the customer. Toyota extended this coverage to 10 years from date of first use or 150,000 miles (whichever came first). I never receied the notice. The details of the CSP are below. (I found on the internet.) "Toyota has received reports indicating various brake system related warning lamps illuminate due to internal…
Apr 20, 2026Service brakes
There are issues with the brake. Many times the brake pedal goes down to the floor and it losses ability to stop. Apparently there is a common ABS actuator and Brake issues. Toyota will not address the issue
Jan 1, 2022
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.
