TSB: Replacement certification labels (the vinyl label installed on the driver door or door post) and VIN plates (the metal plate riveted to dashboard) (see Figure 1) for most 1979 ? 2023 model year vehicles may be available provided the requests meet the criteria listed in this Service Bulletin. Follow the Procurement Procedure in this bulletin to request a replacement certification label or VIN plate.
full bulletin at NHTSA ↗2009 Toyota Prius cruise control problems
severe 56 complaints filed with NHTSA · avg repair $600 · see cruise control across all vehicles →
Failure mileage
Complaints
56
Recalls
0
Avg fix
$600
21crashes
10injuries
When does it fail?
Of the 56 cruise control complaints filed for the 2009 Toyota Prius, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 56 cruise control complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA cruise control complaint has been filed on this vehicle in over 7 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering cruise control on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
TOYOTA: ACCELERATOR PEDAL SENSOR ASSEMBLY INFORMATION REGARDING THE INSPECTION, REMOVAL, AND INSTALLATION, IF LUBRICATION OR OIL, IS APPLIED.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2009 Priuses describe unintended acceleration incidents occurring across a wide range of driving conditions—sitting at traffic lights, making low-speed turns, parking, highway passing, and transitions between electric and gas mode. Most report their foot was on the brake when the vehicle accelerated. Symptoms include the engine revving or "roaring," the car lurching or surging forward at speeds ranging from 2–3 mph up to 108 mph, and a notable delay or total loss of braking response. Several owners state the accelerator pedal felt "stuck" or "partially depressed" on its own, while others report no physical anomaly but uncontrolled acceleration persisting even with brake pedal floored. A subset describe incidents triggered by hitting bumps or potholes, or tied to the transition from electric to gas propulsion.
Nearly all owners who took their Prius to dealers report technicians could not reproduce the failure and found nothing wrong. Owners also report cruise-control not disengaging and a few mention an ABS/VSC light illuminating with momentary brake loss on rough or slick surfaces. Many owner narratives include property damage—collisions with parked cars, buildings, trees, curbs, and fences—and some involve injuries. Floor mats were ruled out by owners in multiple cases. Toyota's responses, as owners report them, ranged from dismissing complaints as "driver error" or "normal operation" to stating no fix is available.
Same Toyota Prius cruise control reports on nearby years: 2006 · 2007 · 2008 · 2010 · 2011
Failure modes owners describe
Unintended Acceleration (Low-Speed Parking/Turning)
Vehicle accelerates on its own while driver has foot on brake during parking or low-speed maneuvers (2–25 mph). Engine revs, car surges or lurches forward, and brakes do not respond or respond poorly. Events trigger collisions with buildings, parked cars, trees, curbs, fences, and other objects.
When: Low speed (2–25 mph); during parking, turning, or applying brakes; early in vehicle ownership (mileage 2,500–20,000 miles common)
Symptoms owners cite: Vehicle accelerates despite foot on brake; Engine roars or revs unexpectedly; Car surges or lurches forward; Brakes ineffective or delayed; Multiple collisions with stationary objects (buildings, cars, trees, curbs); Accelerator pedal may feel stuck or partially depressed
Repairs/costs cited: Dealers report inability to reproduce the failure and find no fault. No repairs documented in owner narratives.
Recalls/TSBs owners mention: Toyota regional techs and dealers attributed events to floor mats, driver error, or stated the vehicle is operating within normal parameters; some owners report no fix is available.
Unintended Acceleration (Highway Speed)
Vehicle accelerates uncontrollably at highway speeds (50–75 mph), often during passing or when driver lifts foot from accelerator. Accelerator pedal feels stuck. Brakes provide minimal slowing; owner must apply extreme brake pressure, shift to neutral, or shut down the engine to stop.
When: Highway speeds (50–108 mph); during passing maneuvers or while cruising; mileage 6,200–31,000 miles
Symptoms owners cite: Vehicle continues accelerating after driver lifts foot from gas pedal; Accelerator pedal feels stuck or depressed; Severe brake pedal pressure required; brakes ineffective at stopping; Engine roaring or gunning noise; Vehicle speed climbs to 70–108 mph and beyond; Brake smoke reported; Shift to neutral required to stop vehicle; one owner turned off engine
Repairs/costs cited: No repairs documented. One owner (Narrative #30) reports recall repair (NHTSA 09V388000) stopped the failure.
Recalls/TSBs owners mention: Toyota stated no problem found; one owner (Narrative #25) reports Toyota denied anything was wrong and dismissed complaint. Narrative #30 indicates recall was issued after incident and repair resolved issue.
Unintended Acceleration During Electric-to-Gas Transition
Vehicle lurches or surges forward when the hybrid system transitions from electric motor to gas engine power, especially at low speeds. Occurs repeatedly for some owners. Reported during idle or slow-speed conditions.
When: During automatic electric-to-gas mode transition; low-speed conditions; within first 10,000 miles
Symptoms owners cite: Car lurches or jumps forward during mode transition; Engine races or revs during transition; Vehicle surges unexpectedly; Can occur multiple times, with one collision reported at first incident
Repairs/costs cited: No repairs documented. Dealers assured owners behavior is normal.
Recalls/TSBs owners mention: Dealers stated this is normal operation; one owner reports no action taken despite multiple reports at 5,000 and 10,000 mile service.
Unintended Acceleration Triggered by Road Surface Impact
Vehicle accelerates or surges forward after hitting bumps, potholes, rough/washboard roads, or slick surfaces. Owner reports this is a regularly repeatable occurrence at a specific road bump. May be related to hybrid system behavior but remains unexplained.
When: Upon impact with bumps, potholes, or rough terrain; mileage 2,500–25,000 miles
Symptoms owners cite: Car surges or accelerates after hitting bump; Momentary acceleration spike; Hesitation followed by surging; Difficult to stop or control after road impact; Repeatable at same road location
Repairs/costs cited: No repairs documented. One owner was advised the behavior is part of the hybrid recharging design and to use parking brake.
Cruise Control Malfunction (Overspeed / Failure to Disengage)
Cruise control continues to accelerate beyond the set speed, or refuses to disengage when brakes are applied. Vehicle speed increases to 70+ mph unintentionally. One owner reports cruise control speed increased to 95 mph.
When: While cruise control is engaged at highway speeds (70–95 mph); summer 2009; mileage 6,200
Symptoms owners cite: Cruise control accelerates vehicle beyond set speed; Cruise control will not disengage on first brake application; Multiple brake applications required to disengage; Vehicle speed climbs uncontrollably; Owner links failure to unintended acceleration issue
Recalls/TSBs owners mention: Toyota instructed owner to take vehicle to dealership; no repair documented.
Brake Loss / ABS Malfunction (Momentary Loss of Braking)
Momentary loss of brake pressure or response, especially on slick, bumpy, rough, or icy road surfaces. ABS/VSC warning light illuminates. Occurs at low speeds (up to 25–30 mph) and sometimes at highway speeds. Brakes become hard to push or unresponsive.
When: On slick, bumpy, icy, or wet surfaces; at various speeds; mileage 9,000–42,000 miles
Symptoms owners cite: Brakes lose pressure or responsiveness momentarily; Brakes become hard to depress; ABS, VSC, or skid-warning light illuminates; Loss of steering capability reported (one incident); Increased stopping distance; Engine warning light may come on; Can occur intermittently over months
Repairs/costs cited: One owner reports repair shop checked tires and adjusted PSI; no resolution. Extended warranty available but expired for some owners; repairs cited at $3,500.
Recalls/TSBs owners mention: Toyota states older 2009 models use different ABS system and are not subject to recall for the issue affecting 2010 models; no recall issued for 2009 for this condition.
Engine Stalling / Hesitation and Surge
Engine stalls or hesitates upon takeoff from a stop, then runs normally after a brief period or after several restarts. Occurs multiple times over vehicle ownership. Vehicle runs roughly, with jerky acceleration or surging. May be preceded by fuel-level confusion.
When: Upon starting or taking off from stop; mileage 2,000–several years of ownership; one recent incident in 2014
Symptoms owners cite: Engine stalls on takeoff; Car putters and stalls for less than a mile; Hesitation or stumbling acceleration; Surging acceleration after stalling period; Multiple restarts required before normal operation; Fuel gauge may not accurately reflect fuel level
Repairs/costs cited: One owner's dealer replaced junction box; owner also replaced water pump. Another owner's repair shop diagnosed no issue without indicator light present.
Recalls/TSBs owners mention: Dealer initially blamed 'bad gas'; Toyota advised to take to dealer. One owner reports no indicator light and no action available. A 2014 recall mentioned but owner's car not included.
Multiple Electrical / Control System Faults (Dashboard Warning Lights)
Multiple warning lights illuminated simultaneously: engine light, ABS, VSC/skid warning. Vehicle experiences loss of power, rough running, radio malfunction, fuel-gauge inaccuracy, and AC failure. No single root cause identified.
When: At 2,000 miles (early in ownership); intermittently during later ownership
Symptoms owners cite: Engine warning light illuminates; ABS and VSC lights on simultaneously; Reduction in engine power; Excessive decrease in acceleration when pedal pressed; Radio selector malfunction (FM/AM not working); MPG display shows inaccurate information; Air conditioner stops working; All three lights come on together at traffic intersection
Repairs/costs cited: One dealer ran tests on two separate occasions with no duplication; no repairs performed. Another dealer was unable to replicate failures.
Synthesized from 56 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
My prius now has all those dash lights on: !, ABS, vcs. I was driving yesterday, on a city street and the lights came on, and the brakes suddenly did not work-hard to push. For months, when I would drive over rough terrain, I had the loss of braking, accelerating, and the slick road icon would illuminate. The is exactly the same ABS module problem affecting 2010 prius, ands needs to be recalled…
Tl* the contact owns a 2009 Toyota prius. While attempting to approach an intersection at 20 MPH the vehicle would not decelerate. Consequently the driver rear-ended another vehicle, which caused that vehicle to rear-end another vehicle. A police report was filed. There were no personal injuries. The vehicle was taken to an authorized dealer and the front bumper was replaced. The failure…
Had cruise control trouble with your 2009 Toyota Prius?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the cruise control problem on the 2009 Toyota Prius?
It's a meaningful issue. 56 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $600.
At what mileage does the cruise control typically fail?
Across the 46 complaints that reported odometer mileage, most cruise control failures cluster between 6,800 and 20,001 miles, with the median around 11,200. A quarter of owners report trouble before 6,800; a quarter make it past 20,001. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $600 for cruise control repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to cruise control?
No active recalls currently cover cruise control issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2009/Toyota/Prius.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.