10.0

really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
0 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 engine problems

engine problem

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2021 Toyota Sienna Owner Comments

problem #3

Dec 132022

Sienna

  • miles

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

when braking the car lunges forward on its own. this has happened multiple times and others speak of it too

- Conroe, TX, USA

problem #2

Dec 032022

Sienna

  • miles
The vehicle gets a jolt of power or speed while braking slowly or coming to a stop. This could result into an accident. This was addressed to multiple Toyota dealers and the problem was unidentified or undetectable to the technician multiple times. The problem is reported by several Sienna forum users but it is not being fixed by Toyota dealers.

- Coppell, TX, USA

problem #1

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

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