9.0

really awful
Typical Repair Cost:
$330
Average Mileage:
116,450 miles
Total Complaints:
6 complaints

Most common solutions:

  1. update oil cooler, steel line upgrade (6 reports)
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problem #6

Nov 092019

Sienna LE 3.5

  • Automatic transmission
  • 158,000 miles

A massive oil leak near the front of the engine. I heard engine loud ticking while drive 70mph. There are low oil level flashes, the check engine light stays on, and you smell burning oil from the engine bay.

Toyota uses cheap rubber line for the hot oil return line, designed to fail catastrophically, and possibly cause engine seizure if driver is not aware.

- pw924, corona, California, United States

problem #5

Mar 262021

Sienna LS

  • Automatic transmission
  • 122,000 miles

click to see larger images

faulty oil cooler hoses faulty oil cooler hoses faulty oil cooler hoses

Driving home for lunch from work, a mile up the road. Noticed smoke coming out from hood at a stop sign. I pulled over and got out. I noticed flames on the ground under van. A lot of black smoke was coming out from under the hood than flames. There wasn't much I could do so I called 911. Fire truck came and put the fire out.

I had this hose replaced three weeks ago by a garage, because while I was driving down a busy road I smelled burning oil. I pulled into a parking lot and all my oil was gone. I went into the store and bought more oil. I didn't even make it out of the parking lot, all the oil poured out. I had my van towed to a garage and fixed. Then I went to another garage for an oil change. I don't know why it was not replaced with a metal hose. I never knew this was an issue until my insurance said, "Let's hope it wasn't a recall." This is dangerous and should be recalled!

- Larry S., Cape Coral, FL, US

problem #4

Oct 232017

Sienna VAN 3.2L

  • Automatic transmission
  • 126,500 miles

This is a known defect that Toyota has ignored. Toyota should be picking up at least part of the cost for the repair. I'm lucky my engine wasn't damaged.

- Tom I., Milford, US

problem #3

Sep 112014

Sienna LE

  • Automatic transmission
  • 114,975 miles

Really lucky, no oil but no engine damage

Lost most of oil through oil leak, under carriage covered with oil--potential fire damage!,

How come no Toyota recall for this problem?

- John G., Spearfish, SD, US

problem #2

Jul 212013

Sienna LE 3.5L V6

  • Automatic transmission
  • 80,000 miles

My engine was making a noise so I stopped and checked the oil. I had no oil on the dip stick so I added 2 liters and drove it to my local dealer that was about 1 kilometer away. When they checked my engine there was no oil left in it and they informed me the oil cooler pipe had failed. What disgusts me most about this problem is that Toyota does not even inform the owners of vehicles that have this faulty oil cooler pipe that it might fail at any time and when it does it will damage or destroy the engine. Toyota is demonstrating that they do not value their customers or their own engine. I can't even get the parts to fix the problem because they are on back order. I wonder why? I wonder how long my local dealer will want to have my Sienna on their lot with the oil slick leading to it? I plan to fix the problem if the parts show up. I have been quoted about $500 for the repair. I have contacted Toyota USA about my problem and they gave me a case # and said sorry we will not help you other that noting your problem.

- macd, Salmon Arm, BC, Canada

problem #1

Jul 032013

(reported on)

Sienna SE V6

  • Automatic transmission
  • 96,934 miles

(I AM A LICENCED AUTOMOTIVE SERVICE TECHNICIAN AND FORMILY THE OWNER OF THE LARGEST PRIVATE AUTOMOTIVE TECHNICIAN TRAINING SCHOOL IN ONT.) The oil cooler system on my 2007 Toyota Sienna was designed with rubber hoses that are held on to the metal pipes with squeeze clamps. These rubber hoses will fail with no warning and cause a catastrophic engine failure within minutes. This design failure is so bad that Toyota had to come up with a complete kit to replace all the hoses, the mounting flanges on the engine and the mounting flanges on the cooler with a complete new design that sees all metal tubes and flange combo in order to fix the very obvious design flaw. There has been no recall for this problem and my guess would be that most people who have had a hose failure wind up with significant engine damage as a result of losing every drop of oil in less than a minute. How can it be that there is no safety recall on this as you would loose your power brakes and power steering when the engine fails. At highway speeds in heavy traffic it could prove difficult to even pull over when the hose fails. HOW CAN THIS NOT BE A RECALL? The bills that customers are paying for this are just incredible. For me I was stuck in a small town for 2 nights, $180 per night at motel. $80 tow bill. $440 for the repair and the parts. (I had the good fortune to have noticed the problem instantly and had the engine shut off within 15 seconds and did no damage to my engine). Obviously Toyota knew it was bad enough that they had to make a complete part redesign. COME ON TOYOTA, TAKE THE RESPONSABLITY FOR YOUR PROBLEM AND DO RIGHT BY YOUR CUSTOMERS BEFORE SOMEONE IS HURT OR WORSE. You keep making crap like this and doing nothing to warn your customers and you won't ever get back to number one

- fpaul, Blenheim, ON, Canada