The contact owns a 2010 Toyota Sienna. The contact stated while driving approximately 15-20 MPH, the vehicle stalled inadvertently. The check engine warning light, the traction control warning light, and other unknown warning lights illuminated. Additionally, the contact stated that the steering wheel lost power steering functionality. The contact was able to veer to the side of the road. The contact stated that the vehicle failed to restart while in Park; however, the vehicle restarted when he shifted into Neutral. The contact drove the vehicle to his residence. The dealer was not notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that they could not assist as there were no open recalls associated with the failure. The failure mileage was approximately 115,000.

- Pontiac, MI, USA

The engine failed while entering the highway. All power was lost and vehicle had to be towed to the local Toyota dealer. I was informed today that in order to analyze the problem the engine needs to be removed at $140 per hour approx. 20 hrs of labor. I have given them permission to do this so I can receive a quote as to how much to repair. This Sienna was just in for 125,000 mile service with no known issues. I do not have any type of documentation as of today June 4,2018.

- Stratford, CT, USA

In motion, when I let up off the accelerator to assess traffic, such as at the top of an on-ramp or other merging situation, then I decide it is safe to merge, and I press the accelerator, the vehicle stalls briefly before "catching" and accelerating. The engine doesn't sputter or cut off, the vehicle just sits still as though it isn't getting gasoline. I've had a few close calls when attempting to accelerate and merge into traffic. This isn't a gear down-shift/up shift type thing...just a stall. It's not every time I slow down to coast, then decide to accelerate, but sporadically. I've had the van checked by the dealer and they couldn't find anything. I was told it's a "computer thing, " with the computer getting confused because to doesn't know whether I want the van to coast to a stop or to accelerate, and "the computer gets confused." I don't have specific dates

- Kernersville, NC, USA

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

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