2018 Toyota Highlander driver assist problems

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

1. What component or system failed or malfunctioned, and is it available for inspection upon request? The issue involves the Dynamic Radar Cruise Control system (vehicle-to-vehicle distance control mode) in my 2018 Toyota Highlander. This system automatically cancels when the vehicle’s speed drops to approximately 25 mph (40 km/h) or below. The system disengages without driver input during normal driving conditions such as heavy traffic or congestion. The component remains functional but poses a safety concern due to its operational design. The vehicle and system are available for inspection upon request. 2. How was your safety or the safety of others put at risk? This malfunction creates a significant safety risk when driving in stop-and-go or congested traffic. The sudden loss of adaptive speed control forces the driver to quickly resume manual braking and acceleration, which can cause delayed reactions and potential rear-end collisions. The unexpected disengagement may also confuse drivers, especially those relying on the system to maintain safe following distances. This behavior increases cognitive load and the chance of driver error, particularly for elderly or less experienced drivers. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The issue has been observed and replicated multiple times during normal driving conditions, such as during city traffic or highway slowdowns. It is also acknowledged in the vehicle owner’s manual, which specifies that the system automatically cancels below approximately 25 mph. However, this design flaw has not been formally addressed or corrected by Toyota dealerships or service centers as a safety concern. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has not been inspected specifically for this concern by Toyota or other third parties. However, the condition is consistent across the same model and year,

NHTSA complaint #11696192 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

1. What component or system failed or malfunctioned, and is it available for inspection upon request? The issue involves the Dynamic Radar Cruise Control system (vehicle-to-vehicle distance control mode) in my 2018 Toyota Highlander. This system automatically cancels when the vehicle’s speed drops to approximately 25 mph (40 km/h) or below. The system disengages without driver input during normal driving conditions such as heavy traffic or congestion. The component remains functional but poses a safety concern due to its operational design. The vehicle and system are available for inspection upon request. 2. How was your safety or the safety of others put at risk? This malfunction creates a significant safety risk when driving in stop-and-go or congested traffic. The sudden loss of adaptive speed control forces the driver to quickly resume manual braking and acceleration, which can cause delayed reactions and potential rear-end collisions. The unexpected disengagement may also confuse drivers, especially those relying on the system to maintain safe following distances. This behavior increases cognitive load and the chance of driver error, particularly for elderly or less experienced drivers. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The issue has been observed and replicated multiple times during normal driving conditions, such as during city traffic or highway slowdowns. It is also acknowledged in the vehicle owner’s manual, which specifies that the system automatically cancels below approximately 25 mph. However, this design flaw has not been formally addressed or corrected by Toyota dealerships or service centers as a safety concern. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has not been inspected specifically for this concern by Toyota or other third parties. However, the condition is consistent across the same model and year,

NHTSA complaint #11696192 — an unverified report by a vehicle owner.

LANE DEPARTURE: WARNING

At 11:15 AM, June 13, 2025 when I turn right at intersection, my steering wheel suddenly became hard (could not turn). My car nearly hit median in my left hand when the steering wheel back to normal. So I could steer my car avoid accident. This is first time I encountered problem like this. Everything is normal right now. No warning or everything popped up on display.

NHTSA complaint #11666872 — an unverified report by a vehicle owner.

LANE DEPARTURE: ASSIST

At 11:15 AM, June 13, 2025 when I turn right at intersection, my steering wheel suddenly became hard (could not turn). My car nearly hit median in my left hand when the steering wheel back to normal. So I could steer my car avoid accident. This is first time I encountered problem like this. Everything is normal right now. No warning or everything popped up on display.

NHTSA complaint #11666872 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

On a trip to NC on June 27 2024, then on to Hilton Head SC on 6/29, multiple system warning lights suddenly appeared on the dash including ABS, Lane Departure Warning, BSM, notifying me that those safety features were not available on the vehicle. Sometimes the the lights would disappear, especially if the vehicle was stopped and the engine was turned off at a rest area. Because the check engine light was not lit, I continued to our NC destination. We continued our trip on 6/29 to Hilton Head, and the lights continued to appear, sometimes staying on for an hour or more. I called my Binghamton NY Toyota dealer who advised me to have the problem looked. I was able to have the car seen at Savannah Toyota (GA) where they diagnosed the problem as an issue with rust and debris on the left front speed sensor. I had the recommended service performed. The service report says that I requested replacing the ABS sensor, which is totally false, because I had no idea what the problem was, I just wanted it fixed. The part was ordered and replaced the next morning. All the lights were back on the next day when I drove back from Savannah to Hilton Head. I did not have time to go back to the dealer, but did notify the service manager of the situation. I drove the vehicle back to NY with the warning lights on (most of the time). I now have a service appt with my local dealer on 7/9/24 to determine the next step.

NHTSA complaint #11600127 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

On a trip to NC on June 27 2024, then on to Hilton Head SC on 6/29, multiple system warning lights suddenly appeared on the dash including ABS, Lane Departure Warning, BSM, notifying me that those safety features were not available on the vehicle. Sometimes the the lights would disappear, especially if the vehicle was stopped and the engine was turned off at a rest area. Because the check engine light was not lit, I continued to our NC destination. We continued our trip on 6/29 to Hilton Head, and the lights continued to appear, sometimes staying on for an hour or more. I called my Binghamton NY Toyota dealer who advised me to have the problem looked. I was able to have the car seen at Savannah Toyota (GA) where they diagnosed the problem as an issue with rust and debris on the left front speed sensor. I had the recommended service performed. The service report says that I requested replacing the ABS sensor, which is totally false, because I had no idea what the problem was, I just wanted it fixed. The part was ordered and replaced the next morning. All the lights were back on the next day when I drove back from Savannah to Hilton Head. I did not have time to go back to the dealer, but did notify the service manager of the situation. I drove the vehicle back to NY with the warning lights on (most of the time). I now have a service appt with my local dealer on 7/9/24 to determine the next step.

NHTSA complaint #11600127 — an unverified report by a vehicle owner.

LANE DEPARTURE: WARNING

On a trip to NC on June 27 2024, then on to Hilton Head SC on 6/29, multiple system warning lights suddenly appeared on the dash including ABS, Lane Departure Warning, BSM, notifying me that those safety features were not available on the vehicle. Sometimes the the lights would disappear, especially if the vehicle was stopped and the engine was turned off at a rest area. Because the check engine light was not lit, I continued to our NC destination. We continued our trip on 6/29 to Hilton Head, and the lights continued to appear, sometimes staying on for an hour or more. I called my Binghamton NY Toyota dealer who advised me to have the problem looked. I was able to have the car seen at Savannah Toyota (GA) where they diagnosed the problem as an issue with rust and debris on the left front speed sensor. I had the recommended service performed. The service report says that I requested replacing the ABS sensor, which is totally false, because I had no idea what the problem was, I just wanted it fixed. The part was ordered and replaced the next morning. All the lights were back on the next day when I drove back from Savannah to Hilton Head. I did not have time to go back to the dealer, but did notify the service manager of the situation. I drove the vehicle back to NY with the warning lights on (most of the time). I now have a service appt with my local dealer on 7/9/24 to determine the next step.

NHTSA complaint #11600127 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE

The contact owns a 2018 Toyota Highlander. The contact stated while driving at approximately 45 MPH, and later at various speeds, the Forward Collision Avoidance failed to operate properly. The contact was unable to turn off the system. The contact stated that under certain driving conditions, while driving and following a curve in the roadway, the system would activate and start braking the vehicle, even though there was no danger of a frontal collision. The contact stated that the failure was persistent. The contact had not taken the vehicle to a dealer or an independent mechanic. The vehicle had not been repaired. The contact wanted the ability to turn the feature of the Pre-collision System off. The manufacturer was informed of the failure. The failure mileage was approximately 79,000.

NHTSA complaint #11575372 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

About6 months ago I started getting the messege "Breaking power low" when i try to start my vehicle. So I took it to Star Toyota Service paid $175 to diagnose the problem. The found DTC 1241 and told me to change the qhole skid control unit. Eventhough on the paper it said skid control ecu battery. So I took it to another dealer named Penn Toyota and they found the same code but they said the voltage is coming low because I may leave my ignition on before I start my vehicle. That sounds funny because I do not do this and on top if i do this my battery would be dead. As of right now I spoke with toyota and since my extended warrenty has finished so they offered my 25% coupon if i fixe the problem. Now I do not know what is the problem and which dealer to trust. The reason I am reporting to "nhtsa" is because if I die because of this problem with my car which is still undiagnosed so at least they can find out the same reason so there will be no more death after me. Again the messege comes on the crean is " Breaking power low. Stop in a safe place "

NHTSA complaint #11487558 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

I am having an issue with my brake assist in my 2018 Toyota Highlander. This car was purchased new and has had regular service/ maintenance with the dealership since purchased. 1st incident was minor in nature. My brake was gently applied and the ABS feature turned on and brake system engaged without any need. 2nd incident brake was applied and at the halfway point the brake stopped working. It felt like it locked. I could not stop my car as I was approaching another car. Car stopped at the last possible moment before impact. The situation was extremely dangerous for myself, my kids and the other driver. Later on during my drive I gently applied my brake and the brake would not release to it original position until a few seconds later. This time the brake light came on. Once the car came to a stop, I shifted my gear to park and the brake light disappeared. The car was then sent to a service station for analysis. Service Station advised that there was a hissing sound coming from the front of my engine when the brake was applied. They recommended that I send vehicle back to dealership as they concluded that the car has a brake assist issue. The car was towed to the Toyota dealership where they mentioned that there was a recall for this exact issue however, my specific VIN is not included. I travel everyday with my kids and this is a real safety issue that needs to be addressed. No car should be on the road with faulty breaking systems. This can cause unnecessary loss of life. These vehicles should be included in this recall, especially mine. I filed a case with Toyota and am waiting to hear back from them. Please help make the roadways safe. Consumer stated diagnosis was completed and relayed that there was a brake booster failure. The brake master cylinder and brake booster system will need to be replaced.

NHTSA complaint #11472855 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

Approaching a stop light brakes didn’t work. The automatic system activated and the car stopped right before I rear-ended the car in front of me. I took it to a Toyota dealership and they diagnosed a faulty brake booster pump with a price of $2500 to replace. I see this isn’t a unique problem for the 2018 Highlander but after talking with Toyota they denied any coverage since my vehicle has 48,000 miles and is out of warranty.

NHTSA complaint #11464075 — an unverified report by a vehicle owner.

LANE DEPARTURE: BLIND SPOT DETECTION

WHEN VEHICLE IS IN MOTION BLIND SPOT MONITORING SYSTEM INTERMITTENTLY DETECTS VEHICLES AND HAS CAUSED ME TO CUTOFF VEHICLES THAT ARE ON THE PASSENGER SIDE DUE TO NO DETECTION. DEALER IS UNABLE TO DO ANYTHING SINCE THERE IS NO SYSTEM FAILURE BUT IT IS A SAFETY ISSUE AND WILL CAUSE DRIVERS TO CUTOFF OR TURN INTO VEHICLES THAT ARE IN THERE BLIND SPOTS. THIS HAPPENS ON CITY AND HIGHWAY DRIVING AND CAN FAIL AT ANYTIME WITHOUT NOTICE.

NHTSA complaint #11171376 — an unverified report by a vehicle owner.