26 of the
383 complaints filed about the Toyota Redundant Sienna
are about the driver-assist systems —
7% of everything owners reported.
The worst model year for it is 2022.
26
Complaints
7%
Share of all complaints
1
Crashes
0
Fires
Driver Assist & Collision Avoidance complaints by model year
While driving at about 40mph on a city street I complete lost steering, brakes and vehicle control. I suddenly started severely swerving/ spinning. I suddenly had no control over the vehicle. The vehicle threw a bunch of codes at once including: anti-lock brakes malfunction, pre-collision system malfunction, secondary collision brake system malfunction, braking power low, parking brake malfunction. I tried to turn off and restart the car and it did not reset any codes. I have brand new tires on the vehicle and just had an oil change and check up two weeks ago. There was no reason for this to happen other than a complete and sudden safety failure of apparently multiple systems. Vehicle is currently being inspected by local Toyota dealer.
NHTSA complaint #11713751 — an unverified report by a vehicle owner.
Pre-Collision System Malfunction, Hybrid System Malfunction, AWD System Malfunction suddenly when restarting the vehicle. Towed to Toyota of Downtown LA dealership. Toyota of Downtown LA Service tells me that the CPU on my relative new Sienna 2022 was fried from jump start when Sienna starting-battery was low. It was done by a AAA professional, I doubt that is the reason for the fried CPU. I believe Toyota engineers would not design/allow the CPU vulnerable to being fried from a jump start. This is a horrific design flaw if it is this way. This happens now, just 6 months after the 3 year warranty coverage. Toyota of Downtown LA Service is telling me it is going to cost me $2900 to replace this CPU. I find this unacceptable.
NHTSA complaint #11686051 — an unverified report by a vehicle owner.
Pre-Collision System Malfunction, Hybrid System Malfunction, AWD System Malfunction suddenly when restarting the vehicle. Towed to Toyota of Downtown LA dealership. Toyota of Downtown LA Service tells me that the CPU on my relative new Sienna 2022 was fried from jump start when Sienna starting-battery was low. It was done by a AAA professional, I doubt that is the reason for the fried CPU. I believe Toyota engineers would not design/allow the CPU vulnerable to being fried from a jump start. This is a horrific design flaw if it is this way. This happens now, just 6 months after the 3 year warranty coverage. Toyota of Downtown LA Service is telling me it is going to cost me $2900 to replace this CPU. I find this unacceptable.
NHTSA complaint #11686051 — an unverified report by a vehicle owner.
What component or system failed or malfunctioned, and is it available for inspection upon request? Toyota Integrated Dashcam, and yes its available to review. How was your safety or the safety of others put at risk? None Stop beeping Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, was replaced once under of warranty and failed again. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No, failed again after 30,000 miles
NHTSA complaint #11636243 — an unverified report by a vehicle owner.
When pulling out of a parking lot, the accelerator disables leaving the car unable to move in the middle of the rode for a few seconds. The happens intermittently and usually when there is traffic going both ways in the area. This has happened several times but has not been replicated with a dealership employee during test drive. After the accelerator disables, it will enable after a few seconds. It has left me sitting in the road with cars honking at me. Van is currently in the shop. Brake pedal was not deployed at the same time of acceleration.
NHTSA complaint #11630099 — an unverified report by a vehicle owner.
When pulling out of a parking lot, the accelerator disables leaving the car unable to move in the middle of the rode for a few seconds. The happens intermittently and usually when there is traffic going both ways in the area. This has happened several times but has not been replicated with a dealership employee during test drive. After the accelerator disables, it will enable after a few seconds. It has left me sitting in the road with cars honking at me. Van is currently in the shop. Brake pedal was not deployed at the same time of acceleration.
NHTSA complaint #11630099 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
When engaging the cruise control, the vehicle continued to accelerate even after I let off the button. During a trip with this vehicle on September 14, 2024, this vehicle did this twice. I have never driven another vehicle where this occurs. If this is supposed to be a "feature", it's unsafe and should not be legal. If it remains legal, there should at least be some kind of safety sticker.
NHTSA complaint #11616165 — an unverified report by a vehicle owner.
This Hybrid LE model brake system is very poor. If we press the break pedal it stops 5-10 meter far. Urgently need for recall and rectify this major issue to avoid more accidents and property damage to others on the road .
NHTSA complaint #11610712 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
When I apply brakes sometimes the brake is released and I need to push the paddle hard to engage the brake again. Same thing happens sometimes on adaptive cruise control. It sometimes release the brake and I need to push the paddle to engage the brake.
NHTSA complaint #11583550 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
I BELIEVE THE COMPUTER CAUSED THE PROBLEM. THE CAR IS AVAILABLE FOR INSPECTION AS PERSONNEL AT GETTEL TOYOTA IN PUNTA GORDA CLAIMED THEY COULDN'T TOUCH THE COMPUTER AND HAVE DONE NOTHING. Purchased Sienna in August 2021. In October at about 5:30 a.m. we were in the far left lane on a PA interstate, traffic came to a stop for construction. A delivery truck in front of us rolled backward a bit. When traffic started up again, our car would not go forward, only reverse. We tried "drive"--nothing--only had reverse. Finally, with cars whizzing around us, shut the engine off. Upon restarting, all gears were restored and we continued on to Boston. We were shaken by this event. Since then, we have had numerous incidents of the car not moving when I put it (mainly) into reverse. I had to shut the engine off--restart--and it went into gear. Latest incidents--first week February 2024--I pulled into a parking space at Englewood Hospital. After visiting my husband, came out, started the car, put it into reverse--NOTHING. Shut the car off--restarted it, and it was ok. Ten minutes later, I pulled off onto the shoulder to take a call from one of his doctors and--no gears. Shut off the engine, restarted it and it was ok. I'M WORRIED I'LL STOP FOR A TRAFFIC LIGHT ON ONE OF OUR 4 OR 6 LANE STREETS AND GET HIT BECAUSE OUR CAR WON'T GO INTO GEAR.
NHTSA complaint #11579932 — an unverified report by a vehicle owner.
I have this car for 1 year, and I’ve have problems when I am driving and I have use the brake the car stop and keeping going forward ,I already had a accident hitting a car in front me,I’ve see a lot complain about this problems and the Toyota is not getting fixed and keeping saying that is the driver fault,I work as a driver I need this problem get fix.
NHTSA complaint #11572459 — an unverified report by a vehicle owner.
1. The vehicle displayed the Rear Cross Traffic Alert (RCTA) warning light along with the Blind Spot Monitoring (BSM) warning light on the dash board. The vehicle was brought to Toyota of Ann Arbor for an inspection. After inspecting the vehicle, Toyota of Ann Arbor reported that road debris (snow, dirt, mud, etc.) was trapped between the bumper and the sensor resulting in the sensor to malfunction. The vehicle has been taken through a car wash with an underbody wash option, but due to the position of the sensor, the sensor is not able to be cleaned from a car wash. The sensor can only be cleaned by removing the bumper. But when the bumper is removed, the sensors have to be re-calibrated and the re-calibration of the sensors can only be completed by trained professionals. 2. Due to the malfunctioning sensor, the driver's safety is put at risk by not being alerted of obstructions (both objects or persons) behind the vehicle, nor oncoming cross traffic, nor detecting vehicles in blind spots. This could cause collisions or worse, fatality, due to the malfunction sensor not alerting the driver. 3. This vehicle has been able to reproduced the problem multiple times and as mentioned above, the vehicle was inspected and confirmed by the Toyota of Ann Arbor dealership. The dealership (Toyota of Ann Arbor) mentioned that there are multiple reports of this issue on other vehicles of the same make and model. 4. The vehicle or component has not been inspected by the manufacturer, police, insurance representative, or others. 5. No prior symptoms were seen or displayed prior to the failure.
NHTSA complaint #11559118 — an unverified report by a vehicle owner.
1. The vehicle displayed the Rear Cross Traffic Alert (RCTA) warning light along with the Blind Spot Monitoring (BSM) warning light on the dash board. The vehicle was brought to Toyota of Ann Arbor for an inspection. After inspecting the vehicle, Toyota of Ann Arbor reported that road debris (snow, dirt, mud, etc.) was trapped between the bumper and the sensor resulting in the sensor to malfunction. The vehicle has been taken through a car wash with an underbody wash option, but due to the position of the sensor, the sensor is not able to be cleaned from a car wash. The sensor can only be cleaned by removing the bumper. But when the bumper is removed, the sensors have to be re-calibrated and the re-calibration of the sensors can only be completed by trained professionals. 2. Due to the malfunctioning sensor, the driver's safety is put at risk by not being alerted of obstructions (both objects or persons) behind the vehicle, nor oncoming cross traffic, nor detecting vehicles in blind spots. This could cause collisions or worse, fatality, due to the malfunction sensor not alerting the driver. 3. This vehicle has been able to reproduced the problem multiple times and as mentioned above, the vehicle was inspected and confirmed by the Toyota of Ann Arbor dealership. The dealership (Toyota of Ann Arbor) mentioned that there are multiple reports of this issue on other vehicles of the same make and model. 4. The vehicle or component has not been inspected by the manufacturer, police, insurance representative, or others. 5. No prior symptoms were seen or displayed prior to the failure.
NHTSA complaint #11559118 — an unverified report by a vehicle owner.
While driving vehicle, warning message come on saying, “Parking brake malfunction. Visit your dealer.” The message stayed on. I delivered the van to the dealer two days later and there it is @ DCH Toyota in Wappingers Falls NY.
NHTSA complaint #11543593 — an unverified report by a vehicle owner.
While driving approximately 25 mph my dash lit up with the cross traffic sensor is unavailable and my blind spot monitor is unavailable. I got out and cleaned off my sensors on the outside of my vehicle all around the vehicle front and back and the warning has stayed on. It was not raining or snowing and I was on dry pavement at the time. My vehicle was not hit nor did I hit anything. There is no damage what so ever to the sensors or anywhere on my vehicle.
NHTSA complaint #11499877 — an unverified report by a vehicle owner.
While driving approximately 25 mph my dash lit up with the cross traffic sensor is unavailable and my blind spot monitor is unavailable. I got out and cleaned off my sensors on the outside of my vehicle all around the vehicle front and back and the warning has stayed on. It was not raining or snowing and I was on dry pavement at the time. My vehicle was not hit nor did I hit anything. There is no damage what so ever to the sensors or anywhere on my vehicle.
NHTSA complaint #11499877 — an unverified report by a vehicle owner.
Today in the morning while driving on normal road, suddenly Rear Cross Traffic alert and Blind spot Monitor became unavailable according to a message on the dash. This message persisted after restarting. In the afternoon another message gave these two company. The vehicle informed me, that the parking support brake is now unavailable as well. Funny is, that these messages are not documented in the alert history of the vehicle, although they still persist. Mileage of first occurrence was 9800. Another user in a sienna forum reported a similar problem and said this might be related to the poor design of the rear bumper that allows ingress and accumulation of dust, dirt and mud around the rear radar sensor. The vehicle was driven the week before the incident and about 700 mi before the incident on a dirt road (County road) in Michigan. This was pretty dusty and a bit muddy, but nothing a normal non-off-road vehicle couldn't stand.
NHTSA complaint #11476230 — an unverified report by a vehicle owner.
Today in the morning while driving on normal road, suddenly Rear Cross Traffic alert and Blind spot Monitor became unavailable according to a message on the dash. This message persisted after restarting. In the afternoon another message gave these two company. The vehicle informed me, that the parking support brake is now unavailable as well. Funny is, that these messages are not documented in the alert history of the vehicle, although they still persist. Mileage of first occurrence was 9800. Another user in a sienna forum reported a similar problem and said this might be related to the poor design of the rear bumper that allows ingress and accumulation of dust, dirt and mud around the rear radar sensor. The vehicle was driven the week before the incident and about 700 mi before the incident on a dirt road (County road) in Michigan. This was pretty dusty and a bit muddy, but nothing a normal non-off-road vehicle couldn't stand.
NHTSA complaint #11476230 — an unverified report by a vehicle owner.
I got the software recall fix last week. Today is the first time I have had any issues. 2 time today the emergency braking activated. First time I was leaving McDonald’s parking lot. I waited for a car to pass then I took off to get on the road. The emergency braking system activated leaving me halfway in the parking lot and part way in the road. I thought that was weird. The a few minutes later I arrived at home and started backing into the driveway like I always do. As I was backing into the driveway a car started to pass on the road in front of me. The car emergency braking system activated leaving me part way in the road and driveway was the car passed. I have saved the ring camera footage of me arriving home in case it is needed.
NHTSA complaint #11463699 — an unverified report by a vehicle owner.
I got the software recall fix last week. Today is the first time I have had any issues. 2 time today the emergency braking activated. First time I was leaving McDonald’s parking lot. I waited for a car to pass then I took off to get on the road. The emergency braking system activated leaving me halfway in the parking lot and part way in the road. I thought that was weird. The a few minutes later I arrived at home and started backing into the driveway like I always do. As I was backing into the driveway a car started to pass on the road in front of me. The car emergency braking system activated leaving me part way in the road and driveway was the car passed. I have saved the ring camera footage of me arriving home in case it is needed.
NHTSA complaint #11463699 — an unverified report by a vehicle owner.