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We found the following complaints for TOYOTA SIENNA (2021)

Read complaints for TOYOTA SIENNA (2021)


We were driving down the freeway when we got rear ended hard by a large pickup. Then we lost electrical and engine power. The brakes stopped working. The hazard lights stopped working. Luckily we were able to coast to a complete stop as there was no way to stop the car. The police came and took a report. Then the car was towed to a body shop. We're awaiting the insurance company adjuster for inspection.

Van has just over 5k miles. Multiple warnings occurred while at speed on a highway. Primary warning was 'low brake power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. This extreme braking is hazardous and could result in an accident caused by braking too quickly - with a possible rear-end collision by traffic to the rear. Additional warnings/malfunctions were listed as well, due to the low brake power: lta malfunction (lane keep assist), automatic emergency brake malfunction, parking brake malfunction, check engine. There were no symptoms of poor braking prior to the incident.dealer filed a tas report with toyota to address the problem, and was subsequently inspected by the toyota field representative. Initially could not duplicate/identify the issue and the van was returned. Within one week the incident reoccurred, again on the highway. Van is currently with the dealer and the brake booster and brake master cylinder will be replaced. Expect the dealer will retain the parts.

Van has just over 5k miles. Multiple warnings occurred while at speed on a highway. Primary warning was 'low brake power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. This extreme braking is hazardous and could result in an accident caused by braking too quickly - with a possible rear-end collision by traffic to the rear. Additional warnings/malfunctions were listed as well, due to the low brake power: lta malfunction (lane keep assist), automatic emergency brake malfunction, parking brake malfunction, check engine. There were no symptoms of poor braking prior to the incident.dealer filed a tas report with toyota to address the problem, and was subsequently inspected by the toyota field representative. Initially could not duplicate/identify the issue and the van was returned. Within one week the incident reoccurred, again on the highway. Van is currently with the dealer and the brake booster and brake master cylinder will be replaced. Expect the dealer will retain the parts.

The adjustable middle seats of this new sienna have a severe safety issue! as someone who has owned 6 prior siennas i am very familiar with this vehicle. In past years the middle seats had two levers- -one foradjusting the back of the seat and one for moving the seat forward or back. This changed with the 2021 model that i just bought to one handle that does both functions. And here is the safety issue--when you lift the handle to move the seat forward or back the back of the seat rockets forward with way too much force and speed. When i tried to do this for the first time yesterday, i was standing outside of the car but had my head inside over the seat when i lifted the seat handle. The back rocketed forward and the hard plastic on the edge hit my head cutting me and almost knocked me out! i was left with a goose egg sized lump and cut. If this is not recalled and fixed by toyota some adult or child is going to get severely injured or killed. The spring that powers the seats movement is just way way too strong. If a person like myself, who has owned multiple toyota mini vans and is very familiar with them can get hurt by these seats you can only imagine what a new owner is going to experience. I took pictures of my injuries and debated going to the er but my headache from this blow eventually went away so i did not. Please look into this before someone ends up with a closed head injury or worse. Thank you so much.

The third row seats in the new sienna, like most minivans, fold flat into the floor.however, there is no latch to hold the seats in place when folded.i noticed this immediately after taking delivery of the van in april because when the seats are folded, they bounce a bit over bumps.on web forums for the car, other owners mention this as well.however, twice in the last two weeks while i was driving the car, the seats popped up out of the rear well and latched violently into place.the first time this occurred was driving over a pothole at about 40 mph, and the second over a speed bump at about 25 mph.i was terrified the first time it occurred - there was a very loud metal on metal noise and impact at the rear of the van.i thought i had hit something, but when i checked after i got home, the seats were out of the well with the bottom cushions latched into place as they would be if the seats were unfolded for use (the backrests remained folded on the bottom cushions).this is a major safety issue.the third row is split into two independent sides, so if anyone was sitting in one side of the seat, they could easily be injured if the other side suddenly sprang from the well.a pet in the rear of the car could easily be killed.depending on weight, cargo in the rear could be thrown around the car.finally, as it was for me, this could be a major distraction for the driver.i checked online, and many others 2021 sienna owners have reported issues with the third row and some have reported the same issue with the seats springing out if the well and latching in place.

When the 3rd-row folding seats are down and stored and the breaks are applied suddenly the seat will release and attempt to return a nonstored position.i had a box of water on top of the seat to keep it from moving.unfortunately when i breaked the box moved and the seat left the stored position and crushed the water bottles. If i had had a pet back there they would have been injured.

We were driving down the freeway when we got rear ended hard by a large pickup. Then we lost electrical and engine power. The brakes stopped working. The hazard lights stopped working. Luckily we were able to coast to a complete stop as there was no way to stop the car. The police came and took a report. Then the car was towed to a body shop. We're awaiting the insurance company adjuster for inspection.

Van has just over 5k miles. Multiple warnings occurred while at speed on a highway. Primary warning was 'low brake power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. This extreme braking is hazardous and could result in an accident caused by braking too quickly - with a possible rear-end collision by traffic to the rear. Additional warnings/malfunctions were listed as well, due to the low brake power: lta malfunction (lane keep assist), automatic emergency brake malfunction, parking brake malfunction, check engine. There were no symptoms of poor braking prior to the incident.dealer filed a tas report with toyota to address the problem, and was subsequently inspected by the toyota field representative. Initially could not duplicate/identify the issue and the van was returned. Within one week the incident reoccurred, again on the highway. Van is currently with the dealer and the brake booster and brake master cylinder will be replaced. Expect the dealer will retain the parts.

A lot wind noise coming from driver side window and windshield at freeway speed. Report to toyota service department but nothing was done to resolve the problem

Factory installed rear entertainment system completely blocks vision of windshield mounted rear view mirror. Toyota has a video version of this rearview mirror but does not make it available to those who purchase models below the limited and platinum version of the sienna. They do not disclose the ubstructed view that will occur when purchasing the vehicle with the rear entertainment system. In canada, toyota provides this mirror as part of the rear entertainment package. They are cutting corners in the u.s. At the expense of our safety. Please require a recall to fix this blatant safety issue that toyota knowingly allowed to be permitted in family vehicles.

We were driving down the freeway when we got rear ended hard by a large pickup. Then we lost electrical and engine power. The brakes stopped working. The hazard lights stopped working. Luckily we were able to coast to a complete stop as there was no way to stop the car. The police came and took a report. Then the car was towed to a body shop. We're awaiting the insurance company adjuster for inspection.

With the rear seat entertainment system in use, the rear visibility is completely blocked in conjunction with the standard rear view mirror. This is a major design defect and is avoidable with available options that should be standard. Without being able to utilize all possible ways to view around the vehicle, toyota has put its owners, occupants, and fellow drivers at unnecessary risk. An easy remedy is toyota retrofitting and including going forward their digital rear view mirror.




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