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At a glance
What can fail
The Intelligent Power Module in the hybrid system can become damaged during certain driving conditions, causing warning lights to appear and reducing or cutting engine power.
This page covers 10 recalls, 2818 owner complaints and EPA fuel economy for the 2010 Toyota Prius.
50 mpg combined
4.7 L/100km
Midsize Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted.
Brake system complaints dominate the 2010 Prius owner report pool by a wide margin. Across hydraulic, electric, and general brake categories, owners consistently describe the brake pedal going soft or sinking toward the floor, reduced stopping power, and increased stopping distances. Warning lights illuminating alongside these symptoms is a recurring detail. Some owners report this happening at highway speeds or in traffic, describing the vehicle as slow to respond when they press the pedal. A portion of owners mention the anti-lock brake actuator by name as the component they believe is involved, though the consistent symptom across reports is the pedal feel and braking performance degrading rather than failing outright and immediately. A smaller number of owners describe brake warning lights coming on without any accompanying pedal issues. Some owners who had braking components serviced previously report similar symptoms returning later at higher mileage.
2,818
Total Complaints
183
Crash-Related
13
Fire-Related
48
With Injuries
By System
The 2010 Toyota Prius has 10 recalls, the most serious involving the hybrid system's power module, which can overheat or sustain damage and cause a sudden loss of drive power, raising the risk of a crash.
Several recalls share this theme: the power module inside the inverter can fail from excessive voltage or high operating temperatures, causing the hybrid system to shut down or drop into a reduced-power mode that severely limits the vehicle's ability to accelerate or maintain speed. A separate inverter-related issue involves the electric water pump, where a corroded internal wire can cause the pump to stop working entirely.
Two recalls involve the curtain shield airbags, where a cracked inflator weld can send inflator fragments or pressurized gas into the cabin during deployment. There is also a seat heater concern affecting vehicles with certain aftermarket heated front seats, where a damaged copper heating element can short circuit and start a fire.
On the brake side, nitrogen gas can leak from the brake booster pump assembly into the brake fluid, reducing pedal pressure. A related braking issue affects how the anti-lock brake system responds on rough or slick surfaces, where stopping distances can be longer than expected for a given amount of pedal force.
At a glance
What can fail
The Intelligent Power Module in the hybrid system can become damaged during certain driving conditions, causing warning lights to appear and reducing or cutting engine power.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
What the fix does
Dealers will update the motor/generator and hybrid control computer software and repair any damage as needed.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A voltage problem in the inverter's Intelligent Power Module may cause the hybrid system to shut down unexpectedly, stalling the vehicle while driving.
What the fix does
Dealers will update the motor/generator control and hybrid control software at no cost to restore proper system function.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A weld in the curtain shield air bag inflator may crack, causing one or both parts of the inflator to break away and eject into the passenger cabin.
What the fix does
Dealers will install retention brackets on the curtain shield air bags to prevent inflator parts from ejecting into the cabin.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The curtain shield airbag inflator may fail and release pressurized gas, causing partial inflation. Inflator parts could separate and enter the vehicle interior, potentially striking occupants and startling the driver.
What the fix does
A retention bracket will be installed to prevent inflator parts from entering the vehicle interior.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The electrical wiring in aftermarket seat heaters with copper strand heating elements can be damaged when the seat cushion is compressed, potentially causing electrical issues.
What the fix does
Dealers will disconnect the seat heaters at no charge and refund the purchase price of the accessory.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Transistors in the inverter module's power component may overheat and fail, causing warning lights to appear and reducing engine power so the vehicle can only travel a short distance.
What the fix does
Dealers will update software in two engine control units to prevent overheating. If the inverter fails beforehand, dealers will repair or replace it at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The Intelligent Power Module in the hybrid system inverter can become damaged during certain driving conditions, causing warning lights to appear and reducing or eliminating engine power.
What the fix does
Dealers will update the motor/generator and hybrid control computer software and make any necessary repairs.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Nitrogen gas from the brake booster pump assembly can leak into the brake fluid, potentially affecting braking performance.
What the fix does
Dealers will replace the affected brake booster pump assembly with a corrected unit.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The electrically driven water pump may have a scratch on the coil wire that occurred during manufacturing. This scratch can cause the coil wire to corrode over time.
What the fix does
Dealers will replace the electric water pump at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
After ABS activates during slow, steady braking on rough or slick roads, the brake pedal feel may seem inconsistent and stopping distance may be longer than expected for the pedal pressure applied.
What the fix does
Dealers will reprogram the ABS control unit software to correct the braking response.
Summarized — see the official notice for exact wording, dates, and contacts.
