2015 Toyota Prius — Known Issues & Recalls

Your brake booster, ABS system, and brake master cylinder failed suddenly while you were driving on the freeway at moderate speed, with no warning lights to alert you beforehand. You were able to safely pull over and get the car to a repair shop, where at 119,000 miles the entire brake system needed to be replaced. The repair will likely involve replacing the brake master cylinder, brake booster, and ABS module components.

Your brake actuator and brake booster are failing, which has triggered multiple warning lights on your dashboard including the brake warning light, ABS light, traction control light, and brake system warning light. Your car has over 10 years of age but is still under 150,000 miles, and Toyota is requiring you to pay for repairs out of pocket despite this being a known issue. Fixing this will likely require replacement of the brake actuator and brake booster components.

Your brake booster failed suddenly at 54,000 miles, causing your brakes to respond more slowly and requiring you to press the brake pedal much harder than normal. When this happened, your ABS light, skid control light, and brake warning light all came on. Fixing this issue requires replacing the brake booster assembly.

Your ABS (anti-lock brake) system failed while driving, causing you to lose braking power. You weren't notified about Toyota's limited service campaign for this issue, which the manufacturer is aware affects multiple model years. This requires immediate repair to restore safe braking function.

Your Prius's brakes completely failed shortly after purchase, even though the vehicle is under warranty and has low mileage. The brake booster actuator assembly appears to be the problem, which you've found is a known issue affecting multiple vehicles. Your car's ABS light stays on and beeps constantly while driving, but no diagnostic codes are being generated, making it unclear why the system isn't alerting the dealership to the problem.

Your brake system has failed—both the brake actuator assembly and booster pump have stopped working at 95,000 miles. Toyota has refused to cover the repair under warranty because it falls outside their recall program window (which ended February 25th), even though your vehicle meets the mileage requirement. The replacement parts alone cost over $1,500, and you've been given no repair assistance options.

Your brake accumulator failed suddenly without warning, leaving you barely able to brake and creating a dangerous driving condition. Your ABS and traction control warning lights came on at the same time. The repair cost $3,300, and while Toyota extended the warranty for this known issue to 10 years, your vehicle was just outside that window. The fix will involve replacing the brake accumulator and possibly flushing the brake system.

Your 2015 Prius experienced a sudden brake system failure in July 2025, with both the ABS and brake warning lights activating on your dashboard. A Toyota dealership confirmed a known defect in the brake system's ABS actuator assembly, which means your anti-lock braking system is no longer functioning properly—this increases your risk of losing control or needing longer stopping distances, especially in wet conditions or emergency braking situations. Toyota has declined to cover the repair because your vehicle is just beyond its 10-year warranty period, with repair estimates ranging from $4,500 to $27,800. The fix will likely require replacement of the ABS actuator assembly and possibly brake system components.

Your brake booster system failed shortly after Toyota's customer service program for this issue ended, leaving you with a $3,000 repair bill. You noticed all dashboard warning lights came on while driving on the highway, which prompted you to have the car towed for repairs. A failed brake booster can cause a complete loss of braking power, creating a serious safety risk. The repair will likely involve replacing the brake booster assembly and possibly related hydraulic components.

Your ABS brake pump actuator is making hissing noises and triggering a warning light on your dashboard. This is happening at 85,000 miles, and Toyota's extended warranty isn't covering the repair. The brake system may need the ABS actuator and booster components replaced or serviced.

Your mechanic told you that your Prius only has front brakes working and is missing rear brake pads and rotors, which they said could create a safety issue. You were advised to have the rear brake pads and rotors replaced. Fixing this will involve installing new rear brake pads and rotors to restore full braking capability.

Your 2015 Prius has a brake system problem involving the master cylinder and vacuum booster that Toyota identified as defective under an extended warranty program covering 10 years or 150,000 miles. You discovered the issue at 139,106 miles in February 2026, but Toyota denied your warranty claim because it expired in October 2025—just 3 months and 8 days before the malfunction was found. The repair costs $3,675 plus tax, and you were never notified about this known defect before the warranty expired. The fix will involve replacing the master cylinder and vacuum booster components in your brake system.

Your brake booster may become defective, causing your brakes to feel hard and making it suddenly harder to stop your car. This problem has been reported on multiple vehicles with fewer than 100,000 miles. The brake booster will likely need to be replaced or rebuilt to restore normal braking feel and responsiveness.

Your 2015 Prius has a brake problem at 95,000 miles that you believe involves defective parts. You're concerned about safety and say Toyota is refusing to help because your extended warranty expired in February 2015, even though you're only 10 months past the coverage date and well under the 150,000-mile limit. The repair costs are significant and unaffordable for you right now. This likely involves replacing worn or failed brake components that may need professional inspection and replacement.

Your brake system has experienced multiple failures affecting your ability to stop safely. You experienced a stiff brake pedal with reduced braking power on the highway, accompanied by warning lights for brakes, ABS, and traction control, creating a dangerous situation. The dealership has now diagnosed a failed ABS actuator and brake booster, which requires replacement of these critical brake system components.

Your brakes felt soft and unresponsive while driving in traffic, and brake warning lights appeared on your dashboard. This made it difficult to stop safely, forcing you to maintain extra distance from other vehicles and use hazard lights as a precaution. The issue likely involves brake fluid, brake pads, or the brake system's ability to generate proper stopping power, and will require a brake system inspection and repair.

Your car's anti-lock brake system (ABS) stopped working while you were driving on the highway. When you tried to brake, it was much harder to stop than normal, even though you didn't crash. The ABS system will need to be diagnosed and repaired to restore normal braking performance.

While driving at low speed, your brake warning lights came on along with the ABS and traction control lights. When you pressed the brake pedal, the car didn't stop as quickly as it should, requiring a longer distance to stop. Your dealer found leaks in the brake accumulator and brake booster pump, and determined that the brake master cylinder and brake booster pump both need replacement.

Your ABS and traction control warning lights came on while driving. A mechanic found a brake fluid hose leak and repaired it, but the problem returned with unusual noises. The dealer diagnosed a failed brake booster that needs replacement. Toyota has a customer support program (ZJB) for this issue, but your vehicle exceeds the 10-year/100,000-mile coverage limit. The brake booster will need to be replaced to restore proper braking function.

Your car's clear coat and paint are peeling, particularly on the roof. You may notice this is happening with the seaglass pearl paint on 2015 Prius models, though Toyota hasn't officially acknowledged it as a widespread issue. Fixing this will likely require professional repainting or clear coat application of the affected areas.