Skip to content
Toyota PriusModel year report

2009 Toyota Prius Problems

Compared with other Toyota Prius years

More complaints than typical for this model

100/100 4.9× a typical year · 50 = typical

Based only on NHTSA complaints, recalls and investigations. Not adjusted for how many vehicles were sold, and not a reliability rating. How this is calculated

Complaints
502filed with NHTSA
Median mileage
30,000miles, 402 complaints with mileage
Recalls
6campaigns on record
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA crash rating
—overall rating starts with 2011 models
EPA fuel economy
46 mpgcombined, 1.5L 4-cyl · hybrid FWD · 48 city / 45 hwy

Sources: NHTSA records for the 2009 Toyota Prius (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

What owners report

Owners of this model year most often describe brake complaints: a momentary loss of braking or a forward surge when the car passes over a bump, pothole or slick patch, plus later failures of the brake actuator assembly accompanied by ABS, VSC and brake warning lights. A second common theme is headlights that switch off by themselves and come back after the switch is cycled, usually at higher mileage. Many early brake and lunge reports came from cars with very low miles, while actuator and lighting reports cluster well past 75,000 miles.

  1. Brakes

    Momentary brake loss or surge over bumps and slick roads

    • 252 complaints (50%)
    • median 14,500 mi at 1.4 yrs old (202 state mileage)
    • 42 mention a crash, fire or injury
    • owner-quoted repair $2,700 (median of 16 quotes)
    • filed 2009–2026

    Owners describe pressing the brake pedal and getting little or no slowing for a moment when the car goes over a pothole, manhole cover or rough patch, sometimes with the stability-control or icy-road indicator flashing. Some say the car feels as if it lurches forward just as they brake, especially when the engine switches between electric and gas operation. Complaints state that dealers often could not reproduce the condition and told owners the behavior was normal for the model. Most early reports came in under 15,000 miles, often in rain, cold weather or on uneven roads.

    What to check: Drive the car over broken pavement and speed humps while braking and note any hesitation or surge; ask whether the brake system has had any prior repairs or software updates.

    2 excerpts from owner complaints in NHTSA records

    “I have a 2009 Toyota Prius, and the brakes do not always engage. There have been several instances where I felt that the car would not stop, one time I even engaged the emergency brake to stop it from going into my garage wall. I have had it into my dealer about 4 times, and each time they haven't found any problem and that it is just the way the car works .”

    NHTSA complaint #10304690, filed 2010-02, 12,000 miles

    “I was driving home from work in my 2009 Prius. When coming to a traffic light (icy conditions) I took my foot off of the accelerator, started to coast and then began to brake. I had total brake failure. The car kept going and I heard a thumping like the anti-lock brakes were trying to engage. I finally had to throw the car into neutral.”

    NHTSA complaint #10306540, filed 2010-02, 22,000 miles
  2. Exterior lighting

    Headlights switching off while driving

    • 102 complaints (20%)
    • median 79,500 mi at 5.9 yrs old (86 state mileage)
    • owner-quoted repair $600 (median of 13 quotes)
    • filed 2009–2021

    Owners report one or both headlights going dark without warning while driving at night, with the lights returning after the switch is turned off and back on or after restarting the car. Bulbs are often replaced and the problem returns, and some complaints say a dealer diagnosed the headlight assembly or bulbs. Many describe it as intermittent and recurring over months. Reported mostly between roughly 40,000 and 170,000 miles, often on cars several years old.

    1 related service bulletin

    What to check: Check both low and high beams at night and watch for flickering or dropouts over several minutes; ask whether bulbs or headlight assemblies have already been replaced.

    2 excerpts from owner complaints in NHTSA records

    “Driving and my left headlight spontaneously turned off. If is not burned out, as it was working when I left, and stopping and restarting the car turned it back on. Very dangerous as the road was dark, not to mention I don't want a traffic ticket. Please stop ignoring this problem.”

    NHTSA complaint #10537741, filed 2013-08, 46,000 miles

    “This has been a recurring problem. The headlights will turn off without any warning. They turn back on if I flip the switch off and then back on again. The fact that the lights are on every time I leave the house (I can see their reflection against the garage wall) means they are not burnt out, but the fact that I have almost been hit multiple times by people who then honk and flash their brights to tell me my headlights are off means that they are turning off on their own. …”

    NHTSA complaint #10735660, filed 2015-07, 98,000 miles
  3. Brakes

    Brake actuator failure with warning lights

    • 72 complaints (14%)
    • median 98,500 mi at 9.0 yrs old (49 state mileage)
    • 7 mention a crash, fire or injury
    • owner-quoted repair $2,755 (median of 12 quotes)
    • filed 2009–2026

    Complaints describe the ABS, brake, VSC and parking-brake lights coming on together, a mushy or unusually firm pedal, a buzzing or groaning pump, and reduced braking or increased pedal effort. Owners say diagnosis pointed to the brake actuator or ABS pump, and several mention a manufacturer warranty program for the part that had already expired for their car. Some also report the instrument cluster going blank at the same time. Mostly reported between about 90,000 and 240,000 miles on older vehicles.

    2 related service bulletins

    What to check: With the car running, listen for repeated pump buzzing and confirm no ABS, VSC or brake lights stay on; ask for service records on the brake actuator and whether any warranty enhancement work was done.

    2 excerpts from owner complaints in NHTSA records

    “Brake actuator malfunctioned and caused me to hit a parked car in my driveway (backing up). Even though I have less than 130k miles on my vehicle, it is a year after the extended warranty I am responsible for paying the $3k repair. The negligence by Toyota in handling this recall is terrible and life threatening. There should be a class action suit against Toyota for the hundreds of injuries and damages by their negligence.”

    NHTSA complaint #11296679, filed 2020-01, 130,000 miles

    “My 2009 Prius with 96425 miles as of 10/29/20 has the common problem known as failure of the brake actuator assembly. I have the brake, ABS, and vsc warning lights indicating failure of the brake actuator assembly. My mileage is reduced by 25%, and the brake rotors are very hot after driving the vehicle. Toyota issued a zg1 warranty enhancement program to cover the cost for replacement of faulty brake actuator assemblies, but my vehicle is beyond the limits of the zg1 program. …”

    NHTSA complaint #11374529, filed 2020-11, 93,836 miles
  4. Vehicle speed control

    Sudden acceleration and lunge complaints

    • 119 complaints (24%)
    • median 11,140 mi at 1.3 yrs old (100 state mileage)
    • 38 mention a crash, fire or injury
    • filed 2008–2025

    Owners describe the car accelerating unexpectedly at low speed, sometimes while braking or when pulling into a parking spot, and in a few reports the cruise control did not disengage on the first brake application. Some complaints say the dealer attributed the behavior to the gas engine engaging or found nothing. Several of these reports involve low-speed impacts. Mostly reported under 35,000 miles, frequently within the first year of ownership.

    Recall 09V388000

    What to check: Confirm the floor mat is the correct type and properly secured, and ask whether the accelerator pedal recall work was completed; test creep and low-speed maneuvering in a lot.

    2 excerpts from owner complaints in NHTSA records

    “Previous to the accident at the 5,000 mile check up I had reported to the Toyota dealer that the car would sometimes jump forward when the engine transitioned from electric to gas mode. They assured me that this was normal. On february 4th at 1035 I was stopped at an intersection behind a large van. The car was in the electric mode when the gas mode kicked in and the engine raced up and the car lunged forward striking the van in front of me. There was no damage the van, the front of my car was damaged. I called the police. …”

    NHTSA complaint #10318894, filed 2010-03, 11,280 miles

    “While inching slowly into a parking spot, vehicle suddenly accelerated at full speed to jump over the parking barrier. Wheels were turned slightly to right, so car veered right and stopped as it high-centered on the barrier, just behind front wheels. No injuries- driver & child in back were buckled. Witnessed by many pedestrians who ran to assist. One witness said the same thing happened in her Prius, but Toyota was useless to help. In months since the incident, Toyota has been terrible at responding in any helpful way. …”

    NHTSA complaint #10683826, filed 2015-02, 68,440 miles

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.

NHTSA recorded 502 consumer complaints for the 2009 Toyota Prius. 402 of the complaints include a mileage, and 57% of those were filed for vehicles with under 50,000 miles; the median is 30,000 miles. Of all complaints, 64 involved a crash, 4 a fire, 27 an injury, 2 a death, according to the filers. NHTSA lists 6 recall campaigns and 225 technical service bulletins for this model year. Compared with the other 11 Toyota Prius model years that have at least 25 complaints and are old enough to compare, this one scores 100 out of 100, where 50 is a typical year for the model (more complaints than typical for this model). The comparison allows for the era and for how long each year has had to collect complaints, but not for how many vehicles were sold.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Steering (13), Electronic stability control (12), Engine cooling (7), Equipment (7), Forward collision avoidance (5), Suspension (5), Seats (2), Visibility (wipers, defrost, mirrors) (2), Seat belts (1), Tires (1), Wheels (1).

Example complaints

Brakes: “Our Prius started making this noise recent... 4 seconds of spinning clicking, then quiet for 5 seconds then repeat. Happens while driving, while parked and I just went out there with my keys in my pocket and opened the door and it started making the noise when the engine starts...so does the rattling and knocking sounds. When I hit on brake, the brake makes very annoying noise.”

NHTSA complaint #11161023, filed 2018-12, 100,000 miles

Exterior lighting: “Driver side headlight problem. Lights turn on when starting to drive but after a while into driving ...13 minuets (is when I noticed) headlight goes out. I drive home afraid to get a ticket. Home is 5 minutes away. I pull in driveway and headlights come back on again. This happens every night when using headlights.”

NHTSA complaint #11109575, filed 2018-07, 176,130 miles

Vehicle speed control: “I was gliding into a commercial parking space with my foot off the accelerator in the second before I moved my foot onto the brake. Suddenly, the accelerator pushed down by itself, the car surged forward towards the truck in the space in front of mine. I slammed on the brake. End of incident. No mat was in the way. I had taken part in the recall.”

NHTSA complaint #10436712, filed 2011-11, 23,687 miles

Electrical system: “Our Prius started making this noise recent... 4 seconds of spinning clicking, then quiet for 5 seconds then repeat. Happens while driving, while parked and I just went out there with my keys in my pocket and opened the door and it started making the noise when the engine starts...so does the rattling and knocking sounds. When I hit on brake, the brake booster makes very annoying noise.”

NHTSA complaint #11156702, filed 2018-12, 100,001 miles

Mileage when problems were reported

57% of the 402 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 9,100 and 90,000 miles.

26%0–1021%10–2511%25–5010%50–7511%75–10013%100–1508%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (402 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 30,000 miles.

Complaints by year filed

Trend: stable. Complaints filed in the last 3 full calendar years are within 25% of the 3 years before.

’08198’11’14’17’20’23’26
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2009 Toyota Prius. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
Prius · sedan FWDnot rated4 / 4———

Ratings before the 2011 model year come from an older, less demanding test and are not comparable with ratings for 2011 and later.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2009 Toyota Prius version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
Prius FWD1.5L 4-cyl · hybridCVT484546$1,450

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2009 Toyota Prius → · Check a VIN at nhtsa.gov/recalls

NHTSA investigations

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 225 on record; the latest 10 are shown.

See all 225 bulletins →

Other model years of the Toyota Prius

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
202661,1001554—Too new
20251612,4502552—Too new
2024273,0004554Too new to compareToo new
20232115,2054554—Too new
20222434,6001552—Rising
202165,2000552—Not enough data
20201412,85004–552—Not enough data
2019305,50035520 · FewerRising
20183710,00015560 · FewerRising
20179114,000355628 · FewerStable
201615519,600555655 · TypicalFalling
201516630,00014488 · FewerRising
201421027,000344834 · FewerRising
201341454,425354844 · TypicalRising
201242450,00064–54880 · MoreRising
201152276,000654872 · MoreStable
20102,8236,41910—50100 · MoreFalling
200950230,0006—46100 · MoreStable
20081,49751,1764—46100 · MoreFalling
20072,00450,0504—46Not compared (before 2008)Falling
20061,43950,0006—46Not compared (before 2008)Falling
20051,05176,8546—46Not compared (before 2008)Stable
200461072,4366—46Not compared (before 2008)Falling
20039971,0001—41Not compared (before 2008)Falling
200216770,2002—41Not compared (before 2008)Falling
200116560,5743—41Not compared (before 2008)Stable

All Toyota Prius model years · Best and worst years by complaints

Frequently asked questions

What are the most common problems with the 2009 Toyota Prius?

Owners of this model year most often describe brake complaints: a momentary loss of braking or a forward surge when the car passes over a bump, pothole or slick patch, plus later failures of the brake actuator assembly accompanied by ABS, VSC and brake warning lights. The issues reported most often: Momentary brake loss or surge over bumps and slick roads; Headlights switching off while driving; Brake actuator failure with warning lights.

How many NHTSA complaints does the 2009 Toyota Prius have?

NHTSA recorded 502 consumer complaints for the 2009 Toyota Prius as of Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2009 Toyota Prius is reported most often?

Brakes is named most often, in 199 complaints (40% of the total), followed by exterior lighting with 111.

Has the 2009 Toyota Prius been recalled?

NHTSA lists 6 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2009 Toyota Prius get?

The EPA rates the 2009 Toyota Prius (Prius, 1.5L 4-cyl · hybrid) at 46 mpg combined, 48 city and 45 highway, with an estimated annual fuel cost of $1,450 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2009 Toyota Prius reported?

Among the 402 complaints that include a mileage, the median is 30,000 miles and the middle half falls between 9,100 and 90,000 miles; 57% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.