pretty bad
Typical Repair Cost:
No data
Average Mileage:
144,200 miles
Total Complaints:
9 complaints

Most Common Solutions:

  1. not sure (6 reports)
  2. dealer says "no problem", this is "normal" (2 reports)
  3. add oil every 1000 miles (1 reports)
2006 Toyota Prius engine problems

engine problem

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2006 Toyota Prius Owner Comments

problem #9

Nov 112015


  • Automatic transmission
  • 200,000 miles


My Toyota Prius has always burned LOTS of oil. I recently learned I am not alone with this problem and that MANY 2006 Prius owners have to add oil every 1000. I also learned this is not a recall and should be considered a manufacture problem.

- terriecatlow, Engelwood, US

problem #8

Apr 022018


  • CVT transmission
  • 140,430 miles

Just disappointing. :(

- D C., Toronto, ON, Canada

problem #7

Feb 012018


  • Automatic transmission
  • 185,600 miles

Annoying! What more can be said, the oil consumption is beyond unbelievable!

- Richard I., North Liberty, US

problem #6

Feb 012016

Prius 4-cyl, Hybrid, 1.5L

  • Automatic transmission
  • 125,000 miles


After 125K miles, now ~135K, my 2006 Prius began burning oil at a rate of 1 qt per 1K miles; there are no leaks, smoke, or sign of anything that will point me to the increase of oil consumption; after reading several logs, including some on this site, it seems a known, almost common issue w/ these Prius cars. I'll be replacing spark plus, PCV valve, and cleaning body throttle and cleaning/replacing MAS (Mass Airflow Sensor) to see if it helps; been religiously following oil change every 5K miles w/ recommended viscosity and other than this the Prius has been perfect and since I bought it (10 years and counting). If I can't get this resolve, I won't be buying Prius again. Toyota needs to fix this issue.

- macondo100, Woodbridge, VA, US

problem #5

Jul 142013

Prius Hatchback 1.8L

  • Automatic transmission
  • 130,000 miles

Thought I'd get at least 200,000 miles out of a Toyota, but now at 150 thousand and it burns a quarter of oil about every 600 miles!!! I have changed the oil myself every 5000 miles. Before it started burning this bad.

- Steve G., Kaysville, UT, US

problem #4

Aug 132014


  • Automatic transmission
  • 160,000 miles

It's getting worse. Burning more and more oil, almost to the point of not wanting to drive more than 50 miles from my mechanic. Mentioned it to the dealership when it started 2.5 years ago and they denied ever hearing of this before me. INSTANT distrust of dealerships and brand. Don't seem to see any reliable fixes or Toyota owning the problem and fixing it. My 3rd and last Toyota.

- Kathleen D., Aguilar, CO, US

problem #3

Jan 282015


  • Automatic transmission
  • 109,552 miles


I've loved my 2006 Prius and have always taken it to a Toyota dealer for service. In January of this year I started to notice that it was burning oil. This is July of 2015 and I'm now burning about 3 quarts every 500 miles. There is no black smoke from the exhaust and not oil on the garage floor. The oil just disappears. A light now comes on and after having it diagnosed I'm told it's the catalytic converter that's bad. I'm willing to have it replaced ($$$$), but not if the excessive oil burning will still be there and ruin another catalytic converter. I could use some advise.

- Ruth S., Hot Springs, AR, US

problem #2

Jan 012014

Prius Full 4 Cly

  • Automatic transmission
  • 106,000 miles

Toyota has known for years about an excessive oil consumption issue with the Prius and from what I hear from mechanics the Rav 4 engines and all that use the same engine. However, Toyota failed to tell the public about the problem...which they say now is not a problem. I have never owned a car, European, Asian or from the American market that has burned a quart of oil every 1000 miles or 4.5 quarts between scheduled oil changes at 5000 miles. My shop has stopped changing the oil as it is as fresh as a new change, just the filter.

If I knew about this issue at 100,000 miles or earlier, I would have certainly sold or traded it back in to Toyota. I'm surprised there is not more complaints on this site as it is clearly on many different blogs and sites with an impending class action lawsuit. But good job Toyota, you have covered yourself well by explaining in your manual that this little engine may need up to 1 quart every 1000 miles! Check your oil often folks! I thought my wife was auto crossing the car as I slept! Were could that oil go but up in smoke, not a drop on the floor or from the tailpipe! So much for a semi-environmentally fresh car...a case of oil a year added to the three services is more oil than one should ever use with a yearly range of 12-15,000 miles of law abiding driving.

Since two and three additional Toyota mechanics all agree this issue will only get worse and before I spend big bucks on a new engine with the same issues, I will give it back to a dealer to cherish forever. Those of you who never check your oil between services are now finding check engine dash lights that are triggered by the low oil sensors. At this point you may have done the early $700. In damage that will lead to the big price gouge...I'm sorry ma'am, but you are going to need a rebuilt as you drove your car without enough oil for the last two months!

As a true Toyota believer and multiple Toyota car owner for 20 years I must say, Toyota, come forward, fess up and offer something here. Your original engine design team made a mistake back then and it's causing a well known problem which most mechanics are aware of but apparently many dealer mechanics still pretend they never heard of the problem despite internal and external notices that are now becoming public information.

- thor179, Hayward, CA, US

problem #1

Oct 252014


  • Automatic transmission
  • 141,033 miles

I'm within 9,000 miles of warranty on batteries expiring....could this be related? Or is this a valve thing? Help please.

- Lora M., Santa Cruz, CA, US

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