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 ↗2011 Toyota Prius cruise control problems
severe Owners of the 2011 Toyota Prius have filed 21 NHTSA complaints about the cruise control, typically surfacing around 75,000 miles at roughly $600 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See cruise control across all vehicles →
Failure mileage
Complaints
21
Recalls
0
Avg fix
$600
| Model year | cruise control complaints |
|---|---|
| 2007 Prius | 81 |
| 2008 Prius | 112 |
| 2009 Prius | 56 |
| 2010 Prius | 216 |
| 2011 Prius (this page) | 21 |
| 2012 Prius | 20 |
| 2013 Prius | 16 |
| 2014 Prius | 12 |
2crashes
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
Dynamic radar cruise control on 2011 Priuses is prone to phantom-object detection. The system locks onto vehicles that don't exist—most often when passing semi-trucks on sunny, clear interstates—and applies hard braking at highway speeds with zero warning to trailing traffic. One owner logged seven occurrences; another saw the issue recur five months after a dealer realignment of the radar sensor. Owners describe a temporary "car ahead" icon on the display while the actual car ahead is far beyond detection range. Disengaging cruise control provides only brief relief; the system locks up again in high heat unless the entire car is shut down. Dealers run Techscan diagnostics and find no codes, then send the car back unchanged.
More broadly, unintended acceleration is a recurring complaint. Vehicles suddenly surge forward while parking or during turns—even with the brake pedal held down. Accelerator pedals stick in the depressed position or fail to return to idle. One case involved the hybrid inverter failing outright during acceleration.
Brake system complaints include intermittent ABS failures that light up a warning, then extinguish without fixing anything, plus brake actuator faults tied to older-model brake boosters and master cylinders (owners cite Toyota Support Program ZJB). Some owners report sudden hard braking events with all dashboard lights blazing for about one second, then the car returns to normal. Dealers consistently tell owners they can't replicate the problems in short test drives, leaving owners without answers or repairs.
Same Toyota Prius cruise control reports on nearby years: 2008 · 2009 · 2010 · 2012 · 2013
Failure modes owners describe
Dynamic Radar Cruise Control (DRCC) phantom-object lockup
DRCC locks onto a phantom vehicle ahead and applies brakes with beeping, causing sudden deceleration at highway speeds with no actual vehicle present. Most common when passing semi-trucks on sunny days at interstate speeds. Condition worsens in high ambient temperatures (above 90°F) and requires turning off the car to clear; merely disengaging cruise control provides only temporary relief. Radar unit suspected of picking up interference from truck satellite systems when overheated.
When: Clear sunny days on interstates, mileage not specified
Symptoms owners cite: Sudden unexpected braking at highway speeds with no warning; Beeper activation; Vehicle locks onto phantom target ahead; Unresponsive to cruise control disengagement in high heat; Multiple occurrences (7 documented in one case); Condition persists or returns when ambient temp above 90°F
Repairs/costs cited: Toyota dealer used Techscan tool; no error codes were generated. Toyota case numbers opened but no repair offered.
Recalls/TSBs owners mention: Toyota opened case files but found no diagnostic codes; dealer test drives showed normal operation; no recalls or TSBs mentioned
Radar cruise control false object detection and slow-down
Radar cruise control detects a phantom vehicle far ahead and causes the car to slow from set speed (e.g., 68 mph down to 45 mph) without any actual traffic ahead slowing. No beeping or brake assist, but cruise indicator shows 'car ahead' icon when no such vehicle exists at that distance. System resumes normal behavior once driver resumes manual accelerator control.
When: After ~30 miles of normal operation on rolling hills with light traffic
Symptoms owners cite: Gradual unexplained deceleration on cruise control; False 'car ahead' indicator on display; 'Car ahead' icon displays even though actual traffic is far beyond detection range; No beep or brake assist; Vehicle slows gently as if responding to phantom braking
Repairs/costs cited: No codes recorded; owner does not expect dealer to investigate
Recalls/TSBs owners mention: No response from Toyota; no TSB or recall mentioned
Intermittent unexpected braking event at highway speed
Car momentarily slams on brakes without any stimulus (no cruise control active, clear dry highway, light traffic, daytime). Dashboard lights illuminate, alarms sound, car decelerates hard as if driver stomped brake pedal (though foot remained on accelerator). Event lasts approximately one second, then car returns to normal. Occurs infrequently (months between events).
When: Unpredictable intervals (months between occurrences) on highway at unspecified speed
Symptoms owners cite: Sudden hard braking with no operator input; All dashboard lights illuminate; Alarms sound; Vehicle decelerates as if brake pedal were fully pressed; Lasts about one second then normalizes; Occurs on clear, dry, lightly-traveled divided highway during daytime
Repairs/costs cited: Toyota field specialist eventually identified PCS wave radar sensor out of alignment due to prior minor deer strike damage repaired at local body shop. Sensor realignment provided relief for approximately five months before problem recurred.
Recalls/TSBs owners mention: Multiple dealer visits; initially dismissed by technician; field specialist eventually diagnosed sensor misalignment and performed realignment
Unexpected forward acceleration while attempting to stop or park
Vehicle accelerates on its own while driver is braking, attempting to park, or releasing accelerator pedal. Occurs at low to moderate speeds (3–50 mph) with no warning indicators. In some cases, vehicle surges forward despite brake pedal depression. Multiple collisions with parked vehicles and fixed objects reported. No diagnostic codes generated in most cases; dealers unable to replicate.
When: Variable: 900 miles, 5 miles, 19,000 miles, 34,000 miles, and other mileages; primarily at low speeds (3–50 mph)
Symptoms owners cite: Vehicle accelerates without depressing accelerator pedal; Acceleration occurs while attempting to park or while braking; No warning lights or indicators; Vehicle surges forward despite brake pedal application; Occurs when releasing accelerator during turns; Multiple incidents of striking parked vehicles and fixed objects; Problem recurs after vehicle restart in some cases
Repairs/costs cited: No repairs documented in most complaints; one case involved vehicle being driven to dealer with no diagnostic performed; another mentions vehicle was 'repaired' but no details given
Recalls/TSBs owners mention: Manufacturer notified in several cases but provided no assistance; dealers unable to replicate; no TSB or recall mentioned
Acceleration after bumps or uneven pavement
Vehicle suddenly accelerates after passing over speed bumps or road discontinuities (e.g., curb edges, construction drop-offs, etc.) at low speeds (approximately 5 mph). Brakes respond normally once applied. Occurs sporadically. Owner speculates possible connection between hybrid motor and battery system.
When: At low speeds (3–5 mph) after encountering physical road obstructions
Symptoms owners cite: Sudden acceleration following impact with speed bump or road edge; Vehicle lurches forward after front tires clear the obstacle; Brakes function normally when applied; Occurs after multiple similar road events
Brake actuator failure with intermittent ABS malfunction
Brake actuator failing with unpredictable ABS performance. Brakes work sometimes but fail intermittently; ABS error light illuminates during failure, then extinguishes as if nothing happened. System provides no clear indication of malfunction, creating safety hazard of sudden brake loss during turns or emergency stops.
When: Unspecified mileage
Symptoms owners cite: Intermittent brake failure; ABS error light appears then disappears without resolution; Unpredictable ABS operation; No clear warning to driver that system is failing
Brake booster and master cylinder failure with poor brake response
Brake, ABS, and traction control warning lights turn on intermittently; when they do, brake response is poor. Audible 'tat tat tat' sound from front of car sounds like ABS being triggered during braking. Cruise control shuts off when these lights appear. Condition occurred after 10-year in-service date. Owner references Toyota Customer Support Program ZJB and TSB for brake booster and master cylinder.
When: After 10-year in-service date; mileage not specified
Symptoms owners cite: Intermittent illumination of brake, ABS, and traction control warning lights; Poor brake response when warning lights are active; Audible 'tat tat tat' sound from front of vehicle during braking; Cruise control shuts off when warning lights illuminate
Recalls/TSBs owners mention: Toyota Customer Support Program ZJB exists for brake booster and master cylinder; TSB available; owner recommends Toyota issue recall and perform repairs
Accelerator pedal stuck or failure to return to normal position
Accelerator pedal fails to return to normal position after depression and remains stuck. Vehicle does not slow when driver releases pedal. When brake is applied, engine revs significantly. No warning light illuminated. Problem resolved by turning vehicle off and restarting.
When: At approximately 119,000 miles
Symptoms owners cite: Accelerator pedal remains stuck in depressed position; Pedal fails to return to normal position; No warning light; Engine revs when brakes applied
Recalls/TSBs owners mention: Dealer referred contact to manufacturer; manufacturer provided no assistance
Unexpected acceleration while depressing brake and start button
Vehicle accelerates unexpectedly after brake pedal and start button are depressed intermittently.
When: At 28,600 miles
Symptoms owners cite: Vehicle accelerates unexpectedly after brake and start button are pressed
Hybrid inverter failure with loss of engine power
While accelerating past a slower vehicle, pronounced thump felt, engine loses power, multiple dashboard lights illuminate, and 'CHECK HYBRID SYSTEM' appears on display. Vehicle driveable only on EV power. Toyota repaired under 2014 EOE program and 10/2018 recall J0A (hybrid inverter failure).
When: At unspecified mileage during acceleration on busy road
Symptoms owners cite: Pronounced thump felt during acceleration; Loss of engine power; Multiple dashboard lights illuminate; 'CHECK HYBRID SYSTEM' warning on display; Vehicle limited to EV-only power
Repairs/costs cited: Cause: Hybrid inverter failure. Repaired by Toyota.
Recalls/TSBs owners mention: Covered under Toyota 2014 EOE program and 10/2018 recall J0A (hybrid inverter failure)
Synthesized from 21 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Had cruise control trouble with your 2011 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 2011 Toyota Prius?
It's a meaningful issue. 21 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 16 complaints that reported odometer mileage, most cruise control failures cluster between 19,000 and 113,000 miles, with the median around 75,000. A quarter of owners report trouble before 19,000; a quarter make it past 113,000. 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/2011/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.