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 ↗2012 Toyota Prius cruise control problems
severe Owners of the 2012 Toyota Prius have filed 20 NHTSA complaints about the cruise control, typically surfacing around 20,000 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
20
Recalls
0
Avg fix
$600
| Model year | cruise control complaints |
|---|---|
| 2008 Prius | 112 |
| 2009 Prius | 56 |
| 2010 Prius | 216 |
| 2011 Prius | 21 |
| 2012 Prius (this page) | 20 |
| 2013 Prius | 16 |
| 2014 Prius | 12 |
| 2016 Prius | 11 |
10crashes
2injuries
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 describe multiple distinct problems affecting 2012 Prius cruise control and related systems. The most frequent complaint is unexpected acceleration triggered by road bumps or potholes while braking—the car lurches forward despite foot pressure on the brake, sometimes nearly causing collisions with pedestrians or parked vehicles. This occurs at low speeds during parking maneuvers and normal deceleration, sometimes repeatedly over months of ownership.
A second pattern involves complete brake failure or unresponsive brakes at low speed, with the vehicle accelerating hard despite maximum pedal pressure. In at least one case, an owner lost control on an incline while attempting to reverse-park, striking two parked cars; in another, the vehicle crashed after a curb strike at parking-lot speed.
Several owners report hybrid system faults. One notes a recall for a "failsafe driving mode" hybrid fault that could cause stalling, but Toyota delayed remedy parts and procedures months beyond the initial notification. Another reports dashboard warning lights (brake, ABS, stability control) illuminating along with soft brakes and a C1391 code for accumulator leak. One owner describes loss of traction control in winter conditions—repeated power cutoff on acceleration that requires physical pushing to start moving.
Lastly, an owner reports ABS module failure that Toyota and independent mechanics cannot reset, disabling cruise control as a consequence. Dealers have been unable to diagnose or repair several of these failures.
Same Toyota Prius cruise control reports on nearby years: 2009 · 2010 · 2011 · 2013 · 2014
Failure modes owners describe
Unexpected acceleration on road irregularities while braking
Vehicle lurches forward or accelerates briefly when hitting bumps, potholes, or rough pavement during deceleration or braking, despite foot pressure on brake pedal. Occurs repeatedly over months and has nearly caused collisions with pedestrians and parked vehicles.
When: Low speed, during parking or normal deceleration; first noticed soon after purchase, recurring at least twice weekly in some cases
Symptoms owners cite: Vehicle accelerates or stops decelerating momentarily after road bump; Loss of braking authority over uneven pavement; Lurch sensation mistaken for engine acceleration; Occurs during parking maneuvers and approach to stop signs
Complete brake failure or unresponsive brakes at low speed
Brakes fail to slow or stop vehicle despite hard pedal pressure, typically during low-speed parking maneuvers. Vehicle accelerates uncontrollably instead, resulting in collisions. In one case, vehicle lost control on incline during reverse-park attempt.
When: Low speed (2–10 mph) during parking, low-speed turning maneuvers
Symptoms owners cite: Brake pedal goes to floor or requires extreme force without effect; Vehicle accelerates instead of stopping; Driver loses control during parking; No response to brake input
Repairs/costs cited: One vehicle required body shop repairs for over one month after hitting two parked cars; dealership inspection ongoing. Other vehicles towed to dealer but not diagnosed.
Recalls/TSBs owners mention: One dealer concluded (without published data) that driver's foot was on accelerator, not brake. Manufacturer sent representative to another incident who found brake and accelerator pedals depressed simultaneously. Dealer collision center promised third-party investigation but remedy pending.
Hybrid system failsafe fault with stall risk
Recall issued for hybrid system fault that could cause vehicle stall during critical driving conditions, increasing crash risk. Owner received recall notice but Toyota delayed remedy parts and procedures indefinitely.
When: <UNKNOWN>
Symptoms owners cite: Vehicle may stall; Loss of power during driving
Codes mentioned: J1V (Toyota recall)
Recalls/TSBs owners mention: Toyota recall issued; dealer states remedy parts and procedures not yet received from manufacturer. Corporate representative stated no timeframe available despite original notice implying 2–3 month window. Dealer denied loaner vehicle offer.
ABS module failure with cruise-control disabling
ABS control module/actuator and pump assembly failure that cannot be reset by Toyota dealership or independent mechanics. PCS (power control system) remains locked, rendering cruise control inoperable.
When: <UNKNOWN>
Symptoms owners cite: Cruise control becomes inoperable; ABS system cannot be reset
Repairs/costs cited: Three mechanics unable to correct the failure
Brake, ABS, and stability control warning lights with soft brakes
Multiple warning lights illuminate (brake, ABS, stability control). Brakes require increased pedal pressure to function. Owner reports C1391 code for abnormal accumulator leak but was never informed of any associated recall.
When: <UNKNOWN>
Symptoms owners cite: Brake warning light on; ABS warning light on; Stability control light on; Increased brake pedal pressure required
Codes mentioned: C1391
Traction control shutdown in winter conditions
Vehicle unable to move from standstill in light winter conditions. When accelerator is pressed, power pulses for a fraction of a second then cuts off entirely. Cycle repeats until car is physically pushed or accelerator released. Happens in both forward and reverse.
When: Cold/winter conditions, from standstill
Symptoms owners cite: Power cut off immediately after brief pulse when accelerating; Vehicle will not move until pushed or accelerator released; Traction control behaves overly restrictive compared to other vehicles under same conditions; Occurs in both forward and reverse
Driver-side footwell airbag interference with braking
After airbag deployment from deer strike, driver-side lower airbag inflated in footwell, physically blocking access to brake pedal. Driver forced to use emergency brake to stop vehicle and faced reduced road visibility.
When: After collision with animal at highway speed
Symptoms owners cite: Airbag deployed in footwell; Unable to access brake pedal; Reduced forward visibility; Required use of emergency brake
Synthesized from 20 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 2012 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 2012 Toyota Prius?
It's a meaningful issue. 20 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 15 complaints that reported odometer mileage, most cruise control failures cluster between 9,700 and 38,000 miles, with the median around 20,000. A quarter of owners report trouble before 9,700; a quarter make it past 38,000. 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/2012/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.