2007 Toyota Prius: adaptive cruise control problems

Filed Jun 5, 2025 · Brakes · AL

The brake actuator failed. When the car was diagnosed by the Toyota dealership, they identified the problem as an internal leak within the brake actuator. Luckily, nobody has been hurt attempting to drive the car, but it is still being driven to get it from home to the repair shop so anything is possible. The first symptom I could link to this was in 2023, when the car would not accelerate via the gas pedal after the brakes were pressed during cruise control. Turning off the car and turning it back on fixed the problem. Afterwards, the red brake symbol was turned on. From that point on, the brake light would only shine sometimes. leading me to believe there must not have been something wrong with the car, since nothing else happened after that. 2024 is when the red brake light and ABS symbol both lit up. The only information that I could find in the manual was to take the Prius to the Toyota dealership. I could not find details on the problem. I continued to drive the car regardless because there seemed to be no problem. After letting the car sit for a few months in 2025, I began driving it again, and it was fine. A month later, I turned on my car and was met with a loud beep that did not end. This was my final sign to take it to get repaired. The car has exceeded 200,000 miles. This fix is $3,205.40 at the dealership. My 2007 Toyota Prius is valued between $2k to $4k. The repair would cost more than simply buying another Prius.

Filed Oct 13, 2021 · Acceleration, Electrical · CA

instrument cluster panel goes completely out and blank, speedometer lost, and dash lights gone and causing other issues such as not being able to turn off vehicle, loss of cruise control, unable to open trunk, navigation screen unable to turn off, backup camera not functioning, front lights going on and off while driving at night.

Filed Mar 5, 2020 · Acceleration, Body · PA

The main dash.display, speedometer, will not show up due to electric problem. Power from rear, aux, battery is interrupted some how. The cruise control will be inop in this situation. There is no way of knowing when the condition will show up, but when door is opened, the indicator light will not come on. Car will have been parked, turned off. Different fixes on the net. My fix is to in plug rear battery's 2 connections, wait then hope, and try again

Filed Oct 6, 2018 · Electrical · 175,000 miles · CA

Combination meter display failure. This is a known issue in which the instrumentation panel and cruise control cease to function. The car may also not turn off without going through elaborate procedures. It is seriously dangerous in that the speedometer and the fuel gauge do not display. Toyota is aware of this defective omponent and issued an "enhanced warranty" to repair the problem, but only if the problem manifested itself within the defined period of the enhanced warranty.. For those prius owners who have experienced this life-threatening flaw after the enhanced warranty period elapsed, the only recourse is to drive an unsafe vehicle or to pay four figures for a repair. A component that is know to be defective should be replaced free of charge at any time if it involves safety.

Filed Nov 15, 2016 · Electrical · 100,000 miles · TX

Dashboard display (including backup display) intermittently functions. This happens when stationary, in motion, on a city street or highway, turning, driving straight, or breaking. The following unsafe conditions resulted: no speedometer, no gas gauge, no tire pressure gauge, no odometer, no cruise control, no backup display, etc.

Filed Sep 26, 2016 · Acceleration, Electrical · 161,200 miles · AZ

The electronic dash (heads up instrument display) on our 2007 prius has intermittently failed to light over the last year. Yesterday, it failed and also wouldn't turn off. We always use the remote (keyless) ignition system. But, after the failures yesterday I put the electronic key fob into the hole in the dash thinking that might help. Instead, I couldn't remove it. I tried every combination of pressing buttons (the park and power buttons) and other controls, brakes pedal, shifter and it still wouldn't shut off or light up the display. After holding the power button in for an extended amount of time, it turned off and ejected the key fob. But then the car wouldn't light up the instrument display or start. This morning, again, it would not start. I was told by an experienced prius mechanic (also an owner) that these were classic symptoms of a failing power amplifier for the display and that it was a "secret warranty," a voluntary repair to avoid a government recall, but that toyota would only do it for 10 years. The dealer refused to do it under warranty even though the symptoms began before the car was 10 years old. They told me the recall was only good for nine years. They want $765 for the repair. It strikes me that this is a safety failure and should be covered, period. With no indication of speed or other functions (ABS function, traction control, etc.), or to turn the vehicle off, it is unsafe to operate the vehicle. The various failures, including loss of cruise control while in motion, took place when the car was cold and when it was warmed up. At rest and in motion.

Filed Jan 29, 2014 · Acceleration · 72,000 miles · AZ

My cruise control lever broke off right at the base. There's nothing but the wires keeping it on. I had to tape it to the steering wheel so it wouldn't make noises from flopping around when I made turns.I have never used excessive force, and my hands aren't all that strong. The cruise control lever is supposed to be used regularly and therefore should be constructed in a way to withstand regular use. However, it's obvious toyota used faulty cheap parts here that don't withstand the intended use. There are numerous complaints here and on other websites regarding this issue affecting numerous cars so it's not a ramdon but rather commen issue. Toyota should offer a customer support program to replace this part free of charge.

Filed Jul 9, 2011 · Acceleration · 40,000 miles · MN

I use my cruise control as often as possible, so I believe that if the lever is flexed even a little bit 20-30 times a day the stress will eventually break it. Mine didn't just snap, it refused to function for a day or two when the amount of flex in the nearly broken lever didn't make the cancel switch engage. It broke completely while engaging it. I found out that others are having the same issue by doing a simple search on the web.

Filed Jul 28, 2010 · Acceleration · 37,000 miles · NM

2007 toyota prius accelerated to 93mph when trying to engage cruise control.

Filed May 28, 2010 · Acceleration · 62,233 miles · CA

Yesterday I was driving back from dropping off my son at school, getting on the freeway, my gas pedal was about 1/2 way depressed, the next thing I know the gas pedal is leaving my foot as if in cruise control and flooring itself, the car engine is racing full speed, fortunately I had run this through my head before, and I was competent enough to apply the brakes as hard as I could, put the car in neutral and safely pull off the freeway and turn off the car. So I was towed into toyota, given a loaner car and told that someone from the factory would come out to run some tests. First let me state, that after this was over I did look down to see if my floor mat was a factor in this, but also knowing that the pedal had left my foot and headed for the floor, the floor mat was a good 2 inches from the pedal. So this morning toyota calls me to say that they have determined that it indeed was my floor mat, no doubts in their minds about that, so they have given me a new floor mat and told me my car is fine. There is no doubt in my mind that this is an electrical problem, not a floor mat issue.

Filed Mar 9, 2010 · Acceleration · CA

My 2007 toyota prius accelerated unintentionally during a lane change. I hit the brakes and this remedied. The floor mat was not involved. I might have had the cruise control on, but I don't remember for sure.

Filed Mar 6, 2010 · Acceleration · 53,000 miles · CA

Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6) 2007 toyota prius (VIN: [xxx] ) - cruise control malfunction. Set cruise control for speed limits between 55 MPH and 75 MPH; within a few seconds of the cruise control being switched on, car automatically accelerates to an uncontrolled higher speed until the brakes are applied (usually in panic of plowing into another vehicle's rear end).