2006 Toyota 4RUNNER Engine Problems
- Complaints
- 7about this part
- Share
- 2%of 381 total for the year
- Median mileage
- 124,101miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 7 complaints about the engine of the 2006 Toyota 4RUNNER, 2% of the 381 complaints for this model year. Where a mileage was given, the median is 124,101 miles. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“When at stopped at a street light or just stop in gear with the brake applied, car will jump forward to a point were I may hit a car in front of me. Second, radiator fan hits the shroud. Caused by broken weld at the motor mounts. Which can cause a fire. Dealer ship in riverside was contacted and they can't do anything about it.”
NHTSA complaint #10478519, filed 2012-10, 185,890 miles“Traction control light came on, check engine light came on and vehicle would move only slowly. Turned car off and on several times, tried engaging 4 wheel drive and other drive functions, tried accelerating, but vehicle would only move slowly. After turning off and on one more time the vehicle drove as normal but all the warning lights stayed on. This happened in a parking lot while going slowly. Mechanic has indicated that this resulted from a failure of the air injection pump and air valve, which apparently for some reason turns off traction control. …”
NHTSA complaint #10706163, filed 2015-04, 118,000 miles“Driving in office parking structure, traveled two floor levels and down two parking structure ramps. At second down ramp, made a right turn to next floor level, and within 21+ feet (with the driver's foot still on the brakes), the SUV suddenly accelerated at a high rate of speed which caused the driver to lose control, sideswipe one concrete column, fishtail within three parking stalls, and collide with a second concrete column, which stopped the vehicle's acceleration. The SUV is a total loss. Injuries are from deployment of the air bag and seat belt.”
NHTSA complaint #10568253, filed 2014-03, 198,000 miles“Cel vscoff vsc trac. Had it checked, was told #6 cylinder plug or coil, replaced coil and all spark plugs .cel light went off the next day but came back on following day. Noticed a sound of water moving in a pipe or what sounded like in a pipe behind dash for a second or so. Was idling and running rough while driving, engine was shaking. Went on some web sites read some comments from other owners ,bad head gasket. 4RUNNER has been well taken care of never abused only 8 years old, normal miles I think, not very happy with this. Bad design of cylinder head. …”
NHTSA complaint #10584407, filed 2014-04, 124,101 miles“Timing belt cover is leaking oil with 36000 miles. After researching online this is a common problem. Was covered under warranty but not now. They gave me an estimate of 1900.00 to replace gasket an water pump. Leaks oil while parked in garage.”
NHTSA complaint #10959636, filed 2017-03Related service bulletins
- 10164330Jul 1, 2019TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections…
- 10149217Sep 14, 2016TSB: Supersession Notice. Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are…
- 10150414Sep 8, 2016Technical Instructions: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service…
- 10150413Sep 8, 2016Dealer Package: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign (SSC)…
- 10150412Sep 8, 2016Dealer Package email: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign…
- 10150411Sep 8, 2016Region Letter: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign (SSC)…
- 10150410Sep 8, 2016Region Letter email: In our continuing effort to ensure the best in customer satisfaction, Toyota has converted Limited Service Campaign (LSC) BST into Special Service Campaign…
- 10134223Sep 15, 2015TT: The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been interrupted.
- 10096556Sep 15, 2015Tt: the vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the engine ecm has been interrupted.
- 10132529Aug 24, 2015TechTip: Condition - The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 2 | 3% |
| 2024 | 1 | 10% |
| 2023 | 2 | 6% |
| 2022 | 1 | 3% |
| 2019 | 6 | 9% |
| 2018 | 5 | 8% |
| 2017 | 2 | 6% |
| 2016 | 6 | 8% |
| 2015 | 8 | 9% |
| 2014 | 6 | 8% |
| 2013 | 3 | 8% |
| 2012 | 5 | 5% |
| 2011 | 6 | 4% |
| 2010 | 3 | 2% |
| 2009 | 2 | 9% |
| 2008 | 7 | 7% |
| 2007 | 3 | 2% |
| 2006 | 7 | 2% |
| 2005 | 21 | 5% |
| 2004 | 18 | 3% |
| 2003 | 10 | 1% |
| 2002 | 5 | 2% |
| 2001 | 5 | 3% |
| 2000 | 4 | 1% |
| 1999 | 3 | 1% |
| 1996 | 1 | 1% |
| 1995 | 8 | 5% |
| 1994 | 1 | 2% |
| 1992 | 1 | 2% |
| 1990 | 1 | 1% |
Other parts of the 2006 Toyota 4RUNNER
143 complaintsOther or unknown
78 complaintsSuspension
65 complaintsBrakes
34 complaintsTransmission and drivetrain
30 complaintsAir bags
24 complaintsSteering
22 complaintsVisibility (wipers, defrost, mirrors)
22 complaintsElectrical system
18 complaintsVehicle speed control
17 complaintsTires
13 complaintsEngine cooling
11 complaints
← All problems reported for the 2006 Toyota 4RUNNER
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology