2010 Toyota Prius — Known Issues & Recalls

Your brake warning lights came on and your brake pedal became soft and unresponsive while driving, requiring much more pressure to stop and significantly increasing stopping distance. A Toyota dealership confirmed the brake booster and brake booster pump assembly failed (error code C1391), which is the same defect Toyota previously addressed in a Customer Support Program for 2010–2015 Prius models—but your vehicle's warranty period for this fix has expired despite normal mileage. The sudden loss of braking power created an unsafe driving situation that could have caused a collision. Fixing this will require replacing the brake booster and brake booster pump assembly.

Your 2010 Prius had its brake cylinder assembly and brake booster pump replaced in 2019 under a Toyota recall program due to a known braking system defect. As of February 2026, these replacement components are now failing again at 224,000 miles—sooner than the original faulty parts failed. Toyota has refused to provide any warranty coverage or assistance for this repeat failure.

Your brake pedal became very hard to push and your brakes didn't work effectively, meaning you needed more distance to stop—creating a collision risk. Multiple warning lights came on at once (brake system, ABS, check engine, battery, steering, tire pressure, and stability control). The brake booster pump, which helps your brakes work, had internal damage that allowed nitrogen gas to leak into the brake fluid, reducing braking power. This same part had already been replaced under a recall, but it failed again after only 41,000 more miles, suggesting the recall fix didn't work properly. Fixing this will likely require replacing the brake booster pump assembly with a new or properly designed unit.

Your Prius is displaying warning lights for ABS, traction control, and brakes, and you're experiencing a spongy, soft brake pedal with a hissing sound from the brake area. The car is throwing a code indicating an abnormal leak in the brake accumulator, which is severely affecting your ability to stop safely. Fixing this issue typically involves diagnosing and repairing the brake accumulator system, which may require replacement of brake system components.

Your ABS light, brake light, and traction control light suddenly came on, your brake pedal became harder to push, and your car made weird humming noises every 5 seconds. Your brake actuator was found to be faulty, causing harsh braking and at least one near-miss where your brakes almost didn't stop in time. The repair involves replacing the faulty brake actuator, which is an expensive part.

While stopped at a traffic light, your brake warning lights (ABS, emergency brake, and traction control) suddenly came on and your brake pedal became much less responsive. You discovered Toyota had issued a previous recall for this exact problem involving the ABS actuator and pump, but the recall has expired and you're no longer eligible for the free repair, which now costs over $4,000. The repair will likely involve replacing the ABS actuator and brake pump assembly.

Your ABS, Brake, and TSC warning lights are all on, and your car is showing error code C1391 related to the ABS pump. You can hear the ABS pump engaging every few seconds while the engine is running, which isn't normal. The error code returns quickly even after you reset it. The ABS module may need to be replaced to fix this issue.

Your brake system has developed a leak in the accumulator (a pressurized component that stores brake fluid), which triggers a warning code C1391 and causes the brake booster pump to run continuously. When this happens, your brakes feel suddenly different because the regenerative braking system stops working. This is a known issue that Toyota has recalled before, but if your car is outside the recall/warranty period, you'll need to pay for the repair yourself.

Your check engine light keeps coming on due to a cracked fuel canister that's causing an emissions leak. You've reported this issue for 14 years, and while Toyota issued a recall in 2016 for this exact problem affecting 2.87 million Priuses, Toyota says your 2010 model wasn't included — even though the problem has existed since your car was new. Fixing this will likely require replacing the fuel canister and possibly related emissions components.

Your 2010 Prius has been leaking fuel from the charcoal canister since you first got it. Even though nearly 3 million Priuses were recalled for this same issue, Toyota says your car doesn't qualify for the recall. You notice a strong gasoline smell when refueling, and your check engine light stays on constantly, which concerns you about a potential fire risk.

Your 2010 Prius has paint peeling on the door and fender panels due to a known factory defect affecting certain Blizzard Pearl and Super White paint jobs. Toyota had a Customer Support Program (CSP) to repaint affected panels at no cost, but you weren't notified and the program expired on June 13, 2025. Contact your Toyota dealership to discuss potential repair options, as the factory paint may need to be stripped and reapplied to the affected body panels.

Your 2010 Prius has blizzard white pearl paint that is peeling and getting worse over time. A Toyota service campaign to address this issue ended in June 2025, before you purchased the car in October 2023, and you didn't receive any notice about it from the dealer. Repairing this issue would likely involve repainting the affected areas of the body.

Your car has two unresolved recalls that dealers won't fix for free. Your brake system is failing—the booster, master cylinder, and ABS pump are leaking brake fluid continuously and making noise, which is dangerous when driving on highways. Additionally, your DC inverter module is draining batteries every few months and the hybrid system may shut down completely, causing loss of control. The dealer says they won't repair either issue without an error code showing, even though both are active recalls and the brake problem poses a serious safety risk. Fixing these recalls will require the dealer to replace the brake booster assembly, master cylinder, ABS pump components, and the DC inverter module.

Your 2010 Prius has a brake booster that was subject to a Toyota recall that expired in 2020 before you purchased the vehicle. The dealership did not inform you of this recall or the issue when you bought the car in August 2020. You're experiencing a DC inverter sensor and brake booster problem that is draining your 12-volt battery completely every month, and you're also noticing noise when the car is off. The dealership says they cannot perform the recall repair because it has expired, leaving you unable to get the issue fixed.

While driving at 70 mph, your Prius suddenly jerked, failed to accelerate normally, and the steering wheel became stiff before the engine stalled. After reconnecting the battery to restart the vehicle, you noticed warning lights for the hybrid system and ABS, and your car would no longer go faster than 65 mph. The dealer suggested an ABS system failure may be responsible. This issue has occurred repeatedly over years without being fully diagnosed or repaired.

Your car's regular brakes and forward collision warning system stopped working suddenly without any warning signs. This happened while driving, leaving you without braking assistance or collision alerts. The system may need diagnostic scanning to identify electrical or sensor failures, followed by replacement of faulty components.

Your car's steering, traction control, brake, and ABS warning lights are turning on and off intermittently, and your brakes feel spongy and unresponsive, making it unsafe to brake properly. Your mechanic suspects a brake fluid leak, but your brake fluid level appears normal; however, this combination of warning lights and soft brakes can affect your steering control and potentially cause an accident. The fix will likely involve diagnosing the brake system for internal leaks, sensor issues, or problems with the ABS/brake control module, and may require replacement of brake components or fluid system repairs.

Your Prius may experience intermittent failures in the regenerative braking system due to a leak in the brake accumulator, causing your brakes to suddenly lose power while driving. When this happens, your brake pedal becomes soft and you must press it hard to engage the physical brake pads, which can cause skidding and creates a dangerous situation—especially at highway speeds in traffic. Although the warning code may occasionally clear on its own, a whirring sound indicates the part is still damaged and the problem will return without warning. Fixing this typically requires replacing the brake master cylinder and accumulator assembly, then recalibrating the system.

Your brake system warning lights (ABS, brakes, and stability control) came on when you pressed the brake pedal. A mechanic diagnosed the problem as a faulty brake booster and accumulator that need replacement. Toyota said your vehicle wasn't covered by a recall for this issue, and the recall period has expired. The problem occurred at 172,000 miles.

Your accelerator pedal went all the way to the floor while driving downhill at 45 mph, but your car didn't speed up as expected. After turning the car off and back on several times, it worked normally again. The problem happened again later when turning at a low speed on a downhill stretch. The vehicle wasn't repaired, and both the dealer and Toyota were notified.