The vehicle cruise control works fine on a flat surface, but when it encounters a downgrade it accelerates 10mph over the set speed and the rpms increase to 4000. The vehicle then applies the brakes forcibly to slow to the set speed. It seems to downshift but doesn't let off throttle so it speeds up rather than engine brake.

- Pleasant Mount, PA, USA

Car recently is not shifting properly. Drives at high rpms and if I accelerate too quickly say I get up to 80 mph on highway car won't shift into next gear the rpms suddenly drop all the way down to under 1000 and quits accelerating until it jumps back into gear. Have to let foot off the gas for it to shift and cruise control has been not functioning properly either.

- Mishawaka, IN, USA

The contact owned a 2018 Toyota Corolla. When the contact placed her vehicle into park, the vehicle accelerated without warning and the tachometer level increased. The contact attempted to depress the brake pedal with force using both feet, but the vehicle did not respond and crashed into the wall of a convenient store. The air bags did not deploy. There were no injuries. The cause of the failure was not determined. A police report was filed. The vehicle was towed to a collision lot where it was deemed a total loss. The manufacturer was contacted and provided case number: 1908261236. The dealer was not contacted. The failure mileage was approximately 15,438.

- Augusta, GA, USA

Tamara inflator. The cruise control in my 2018 Toyota Corolla has been messed up ever since I bought my car last year.I told the dealer ship about it they claimed they adjusted it but it still increases my speed going down hill and I've got a speeding ticket because of it.my daughter also called Toyota main head quarters but they said if I wanted it fix I would have to pay out of my pocket..I will set my cruise control at 60 on the hwy if I go down a small. Hill my RPM and speed go up.

- Martin, SC, USA

The 2018 Toyota Corolla cruise control is dangerous. When cruise control is on, going down a slight hill, the transmission downshifts but throttle does not reduce causing car to increase speed 10-15 mph with high rpms. At bottom of incline transmission goes to higher gear and brakes are applied very hard causing vehicle to suddenly and violently slowdown 15-20 mph. In this situation if cruise control is not disengaged the car will go well over the speed limit and to an unsafe speed for the roadway. The braking action is so sudden and violent it's difficult to control the vehicle and has several times in a couple of months caused me to very nearly get rear ended by a vehicle behind me which was not originally following too close. As the dangerous cruise control starts its increase in speed the vehicles behind may increase their speed and as they are increasing speed my car cruise control system jams on the brakes and cause the following car to come dangerously close to collision. As well the other driver has on at least one occasions became angry started road raging thinking I had purposely brake checked. The 2018 Toyota Corolla cruise control is dangerous, could certainly be deadly based on my experience and further is virtually unusable as a purchased feature on anything but a flat road. I've driven over 20 cars in my life and am very experienced with cruise controls in 6 different manufacturers cars. The cruise control on my 2018 Toyota Corolla could cause injury, lawsuit, road rage with personal injury or death. I've already had it to the dealer twice and am taking it back this week.

- Columbia, SC, USA

They asked me to come to Toyota of dallas to fill out an "unintended acceleration" ua report (see below). The technician became very angry about this issue and told me that the manufacturer created the car this way. Under almost any circumstance, (going around a sharp curve, heavy traffic, any downhill or uphill, weather conditions, or fog) when using the cruise control the car will try to slow it self down from set speed at 65 mph, by dropping into a lower gear, ramping up the RPM's to 5000 forcing the vehicle to accelerate 10 to 15 miles over the set speed which was set at 65 mph. In this case, the brakes will not stop this acceleration while the vehicle is amping upward. The only way to stop the unintended acceleration is to turn off the cruise control. Highway driving from carrollton, Texas to waco, Texas on a clear day. My company has a policy that company vehicles should not exceed 70 mph. It is a fireable offence.

- Mckinney, TX, USA

The RPM of the car jumps upto 4000 when attempting to slow the car on down hills. Toyota dealerships are refusing to acknowledge the issue but there are cases many people got their car fixed or exchanged. This proves the issue when using cruise control. The ideal intent of using the cruise control is to save gas mileage and effort to drive the car for long distances. I have to travel long distances to work on daily basis. I feel very uncomfortable and unsafe driving the car on cruise. Toyota should acknowledge the problem to save the trust of the customers. This happens consistently. I am trying to contact Toyota for the issue. I hope to receive a positive response.

- Birmingham, AL, USA

When using the radar controlled cruise control, the engine will sometimes rev to over 4000 RPM. A Toyota field engineer told me that this is engine braking, but this occurs when the car is on a level stretch of highway at the set speed and no other unusual circumstances. This exact same problem occurs with my wife's 2017 Corolla. I've read a number of comments on the Toyota owners website (https://www.Toyota.com/owners/community/ask-an-owner/question-details/id/62752030). some have even said their cars speed up when this phenomenon happens. This has happened consistently every time I've used the cruise control since I took delivery of the car on 12/1/2017, and it happens multiple times per trip. The date I entered below in this form was only the latest occurrence.

- Chalfont, PA, USA

The cruise control system is designed so the engine and transmission down shifts when the system is engaged and going down hills. This puts much more wear and tear on both the engine and transmission. In addition to the down shift the RPM goes to over 4000 in an attempt to slow the car. This is completely unnecessary and drastically reduces gas mileage, which is exactly opposite of the original intent of the cruise control which was better gas mileage and peace of mind to not speed. The speed does go up 5 miles per hour when this happens. Bottom line is the engineers and their bosses who approved this system are all idiots and should be fired. You would assume you would get better gas mileage when going down hill when the engine would disengage because you would need less power and not more to maintain a certain speed. I was informed by the dealer the cruise control is designed to operate by gearing down, I told him no manufacture is that stupid.he then proved me wrong by showing me the manual proving Toyota is that stupid.I would have never purchased this car had I known this feature was designed in this way. Who knows what other systems in this Corolla are designed in such a stupid manner. I will certainly never buy another auto from this company.

- Spartanburg, SC, USA