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10.0

really awful
Crashes / Fires:
7 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
1,881 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2021 Toyota Sienna brakes problems

brakes problem

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2021 Toyota Sienna Owner Comments (Page 4 of 4)

« Read the previous 20 complaints

problem #9

Jul 172022

Sienna

  • miles

A D V E R T I S E M E N T S

When breaking on a flat dry level road the car accelerates for a split second. Has happened multiple times with different drivers.

- Mesa, AZ, USA

problem #8

Mar 012022

Sienna

  • miles
After the vehicle has been parked for a while, after starting the car the brakes give the following intermittent behavior. When releasing the brake pressure gradually, the vehicle will not move until the brake pedal is fully released. The vehicle then lurches and rolls backward quickly. Additional pressure then must be applied to stop the car. The car should start to move when the brakes are gradually released and not wait until the brakes are fully released. This happens almost every time I start the car. It is a recurring problem.

- North Canton, OH, USA

problem #7

Aug 102021

Sienna

  • miles
En ocasiones el vehículo no frena adecuadamente, tiene ruido en la parte delantera y se aselera bruscamente cuando está en descenso por aproximadamente 5 minutos

- Ponce, PR, USA

problem #6

Apr 222022

Sienna

  • miles

A D V E R T I S E M E N T S

Our Sienna has had incidents of unintendedly accelerated a minimum of 25 times. I have been unable to stop the vehicle several time to the point where I have had to go through a lighted stop intersection. There have been numerous "close calls-?? where I have nearly hit the vehicle in front of me. My wife, while driving to pick up my 4 children, actually bumped into a vehicle in front of her. It is a serious risk to expect that I drive the vehicle with my wife and 4 kids inside, yet Toyota expects I will drive the Sienna for over a month while they wait to get the report back about the vehicle. I am not willing to put my life at risk along with my wife and four children while we wait for Toyota to address the issue. We brought the Sienna in after the initial few close calls (March 14, 2022), and they were unable to find anything wrong. After receiving the vehicle back, the issue continued. Once my wife was in an accident with the Sienna, we have decided we will not be driving it until we are assured it has been resolved. It was brought back to Toyota on April 19, 2022). At this point and I not confident Toyota will be able to fix the issue. Toyota has deemed the car safe to use; even though they have not received back the report. It's reckless and immoral to knowingly place someone in a vehicle that has already caused 1 accident (although thankfully very minor) and something I am unwilling to do. Meanwhile Toyota has offered nothing to keep me safe or offered a vehicle in the meantime. The forward collision does not work. The entire vehicle is available for inspection. I am not certain what Toyota has inspected, but an inspection was performed on May 10th and the results will not be available until June 13th. Problem is not able to be reproduced as the car has not been driven. The warning sign prior to the accident was numerous other near misses.

- Wyoming, MI, USA

problem #5

May 112022

Sienna

  • miles
Braking is slow or non-existent on random occurrences. Although the car is automatic, it feels like you are pushing in the clutch when brakes are needed. At times when braking too, it feels as if the car lunges. On two occasions, I narrowly missed hitting an object. Its as if the braking hesitates. The dealer said that this is the design based on the vehicles software. They asked us to call Toyota-??s customer service to complain.

- Raleigh, NC, USA

problem #4

Oct 122021

Sienna

  • miles
1st. Brake sometimes get very stiff can-??t press down and becomes normal after a few seconds or a few press on the brake pedal. (5 months) 2nd. A lot of wind noise coming from driver side windshield starting at 65mph. Complain to 2 dealers both said they test drove the same car but I don-??t see any other Sienna around. They lied (1st day I took possession of the car) 3rd. The middle row seat rail are very hard to slide back and forth. (1st day)

- San Lorenzo, CA, USA

problem #3

Dec 172021

Sienna

  • miles

A D V E R T I S E M E N T S

After the vehicle has been parked for a while (>1 hour in my experience), upon startup, when reversing down a hill, the brakes give the following intermittent (maybe one out of four start ups) problematic behavior. When releasing the brake pressure gradually, the car will not move, until suddenly it lurches and rolls backwards significantly, the pressure on the break feels like it is reducing and the brake stroke length releasing. To stop the car rolling backwards you need to push down several extra inches on the brake to get it to stop. I have multiple videos of this happening (video of my feet and the rear camera).

- San Diego, CA, USA

problem #2

Jul 242021

Sienna

  • miles
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.

- Palos Verdes Estates, CA, USA

problem #1

Jun 262021

Sienna

  • miles
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.

- Edmond, OK, USA

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