hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
71,424 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.

2010 Toyota Sienna engine problems

engine problem

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2010 Toyota Sienna Owner Comments

problem #2

Apr 262016


  • 96,000 miles


About 20 minutes away from home we heard some "growling" and "ticking" noise from the engine. No instrument warning lights came on. As we pulled into our steep driveway, the oil pressure light started to blink. We shut the engine. Upon inspection, the oil dipstick appeared dry. I added about 4 qts of oil, and started the engine. It sounded normal, and no warning light was displayed. I brought the car to a level area and checked oil again. I added another quart - oil was between the marks on the dipstick. I noticed light dripping from the front area of the engine, near the oil cooler. I then drove the car to the auto repair shop (about 4 miles away). Engine sounded ok, no warning lights. Next day I was told that the oil line to the oil cooler is leaking, and there's damage to the engine due to running with no oil. I assume that the engine operated with no oil when we heard noises - but how could the oil leak out and run the engine dry for 15 minutes *before* the light came on" how common is the problem of the oil-cooler hose failing? does this model share the same engine as the Lexus RX350" if so - is the problem related (I read that many RX350 owners complained about this) ?

- Ann Arbor, MI, USA

problem #1

Mar 172015

Sienna 6-cyl

  • 46,847 miles
Toyota Sienna 2010 minivan engine stalls while driving. When driving on highway or on city roads, engine stalls and looses engine power for a few seconds (seemingly happens when shifting gears) when accelerated or decelerated. The engine basically stalls during driving and may lead to sudden vehicle slowness in middle of traffic. The suspected problem advised by Toyota is with transmission and the original cost estimate was $5100 to fix that. Later after discussing with Toyota it was lowered to $3800 (approx) and Toyota warranty support was ready to pay (absorb) $2000 and $1800 to be paid by the customer. Even after initial repair and payment of ($1800+tax) $2166 the vehicle still have the same symptoms and issues. Presently the vehicle is under repair with the dealer (fremont Toyota, ca). The vehicle use was normal, regular city/highway usage, well maintained single owner. Nothing heavy was towed and used in rough or abnormal conditions. If possible ntsb needs to: 1. to look into this model of vehicle and see if there are other reported problems with Sienna 2010 engines. 2. to investigate why this vehicle have this issue within 46,847 miles. 3. can manufacture bills the entire cost of repair, since this seems a major design or engine issue with this model of vehicle. 4. advise to issue a safety notice to all Toyota Sienna 2010 V6 engine model owners since this can be disastrous in middle of traffic and can cause accidents/problems to all on the road.

- Fremont, CA, USA

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