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NHTSA — Engine Problems


really awful
Crashes / Fires:
0 / 1
Injuries / Deaths:
1 / 0
Average Mileage:
73,945 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.

2006 Scion tC engine problems

engine problem

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2006 Scion tC Owner Comments

problem #12

Jan 202014


  • 110,000 miles


Oil consumption!!! I've owned my 2006 Scion Tc for about 5 years and have recently been experiencing a huge oil consumption issue. It didn't phase me at first, although now I need to set my odometer to zero and refill my oil every 800 miles. I believe it is certain internal parts that are causing this problem, such as the pistons and the piston rings. I've noticed that this has been an ongoing problem for a lot of Scion Tc's lately, which has been taken care of through an extended warranty program for the model years of 2007-2009. I'm trying to prove that issue is also affecting the 2006 model year too, and would greatly appreciate it if I could receive some help concerning this issue. I will upload a photo of an old piston that shows this exact problem.

- Hilo, HI, USA

problem #11

Jul 272012


  • 53,000 miles
Engine has sever oil consumption to where we are adding a quart or more every 1000 miles or so in between oil changes. Worries me to were I check every week just to make sure there is enough oil. I should not have to worry about that sort of thing. While driving om streets or highways, happens every where, as you shift at a certain RPM (about 1500-2500-3000 ect) the car will hesitate for a few seconds. We originally thought it was from the A/C since I bought the car in the summer time but once the A/C is off the car still hesitates. We have noticed we are not the only ones with this issues but we are the only year that is reporting them. What is going on with my engine and fuel system?! please help!!!!

- Boise, ID, USA

problem #10

Feb 132016


  • 186,594 miles
The contact owned a 2006 Scion Tc. While driving 65 mph, the contact noticed flames underneath the vehicle as it spread to the engine compartment of the vehicle. The fire department was able to extinguish the fire. A police report was filed. The contact did not sustain any injuries. The vehicle was destroyed. The manufacturer was not notified of the failure. The failure mileage was 186,594.

- Prichard, AL, USA

problem #9

Jan 212016


  • miles


Leaking engine coolant from back of cylinder head. Took car in to have head gasket changed was told the gasket was not the problem. The problem was the engine block that the threads in the engine block were stripped. Was told by Toyota that it was a big problem and it would cost between 1500-1700 to fix the head bolt threads. Consider the number of cars trucks and SUVS with this engine there should be a recall or some type of owner assistance for this problem.

- Troutman, NC, USA

problem #8

Jul 172015


  • 47,841 miles
The contact owns a 2006 Toyota Scion Tc. While driving at any speed, the check engine warning light illuminated and there was a fuel odor. The vehicle was taken to the independent mechanic who diagnosed that the ignition switch leaked. As a result, the charcoal canister was replaced. The manufacturer was not notified of the failure. The approximate failure mileage was 47,841.

- Brookesville, FL, USA

problem #7

Dec 122014

tC 4-cyl

  • 130,900 miles
The head gasket failed on my 2006 Scion Tc. While fixing the gasket and removing the head bolts, pieces of the aluminum threads from the engine block came out attached to the bolts. The aluminum threads wrapped around then blots 2, 3 and sometimes 4 times. It was clear that this was the problem and why the head gasket had failed. -- this is a problem in the 2000-2010 Toyota Camry and Scion Tc engines. -- this search of the internet show the extent and the numerous omplaint related to this problem. Https:// -- this video showing how to fix the problem. Https:// -- a recall and/or reimbursment program need to be setup for these automobiles.

- Sugar Land, TX, USA

problem #6

Jan 012011

tC 4-cyl

  • 80,000 miles


My car consumes about two quarts of oil per 1000 miles. Mechanics have told me that it doesn't appear to be leaking, it could be being burned though. I keep my car running with frequent oil changes and go through a good amount of oil every month in between. Many other Tc drivers have told me they have this same issue also.

- Mission Viejo, CA, USA

problem #5

Feb 012015


  • 91,000 miles
2006 Scion Tc -battery light on -engine temperature indicator no working -whining noise coming from engine try to jumpstart makes this burning smell and wont start started seeing smokes from jumper cables so turn everything off now it's totally dead.

- Westminster, CA, USA

problem #4

Aug 152014


  • 112,000 miles
The engine sound increased while I was driving on highway. Got back home check the oil level it was dry. Found out that these Scion have a problem with oil consumption.

- New Bedford, MA, USA

problem #3

Jun 012006


  • 7,000 miles
Trd supercharger was bought and installed at dealer multiple issues with product blown supercharger and engine and paid for another supercharger out of pocket after 7 superchargers and 5 motor blocks car was put back to stock and was never reimbursed for either supercharger and item was discontinued due to multiple people having similar problems wrote to corporate and they still refuse to reimburse for my paid for equipment a lot of people have had the equipment repaired and even had the car fully reimbursed minus depreciation I'm only asking for reimbursement of the 2 units that I paid for that Toyota has taken away from me.

- Rockland, MA, USA

problem #2

Feb 032013

tC 4-cyl

  • 69,000 miles
Scion Tc 2006 - temperature went all the way to hot on the gauge. The check engine light came on. The car started running rough. Took the car to local service station. They took the head off. Said the engine block bolts are stripped. Mechanic is charging $3000+ to fix. See this issue posted here and elsewhere on line with the 2006 Scion.

- Princeton, NJ, USA

problem #1

Aug 282012

tC 4-cyl

  • miles
On 08/28/2012 I was driving on the freeway on my way home from work when I noticed the radio went out. I exited the freeway. I made it about 2 blocks and was at a stop light when suddenly my car wouldn't advance. A police officer a few cars behind was able to push my car to the side of the road. I had my car towed for service to an independent non-Toyota mechanic. I was told I needed a new alternator. Given this was a necessary repair I went ahead and had the repair done. The car was running pretty well until 01/01/2013. On 01/01/2013 I was driving home when I noticed the heater stopped working. Thinking nothing of it, I kept driving. On 01/04/2013 (about 75,000 miles on the vehicle) I was returning from an errand (driving about 35 mph) when I noticed the check engine light had turned on. I pulled over at a gas station to fill up and called an independent non-Toyota mechanic to see if I could bring my car in. I was instructed to bring my car in on 01/05/2013. After I pulled out of the gas station and drove a few blocks I noticed the needle for the thermostat was at the hottest level possible. The next morning I took my car in, it overheated in the 5 minutes it to me to arrive to the shop. I was informed the engine had stripped head bolts and I would need a new engine. I called Toyota/Scion and they didn't acknowledge either the alternator or stripped head bolts being an issue. The representative, [xxx] said they would open up a case and I was given the following case # 1301070610. I however came across various Scion/Toyota owners online who have had this issue. A simple google search for "Scion stripped head bolts" will show just how many people have this problem. I was told by [xxx] that if in the future Scion/Toyota recognizes the issue(s) I may receive a reimbursement but there is no guarantee. This is an expensive fix that I just can't afford. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Covina, CA, USA

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