really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
8,034 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.

2010 Toyota 4Runner engine problems

engine problem

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2010 Toyota 4Runner Owner Comments

problem #5

Feb 012015


  • miles


Vehicle randomly and suddenly revs itself both from a stopped position and while driving. When driving downhill and I take my foot off the gas the vehicle will continue to rev itself around 3000 RPM then when I start to travel uphill it will down shift to about 1500 RPM. This seems backwards. Tapping brakes does not cause it to downshift as needed, does not seem right to apply brakes and vehicle continues to rev itself higher nor does it seem right to take foot completely off the gas pedal and the vehicle continues to rev up. The only way to get it to idle is to apply pressure to the gas pedal and speed up which is dangerous when already going downhill. When travelling in a parking lot it rev itself up and will jump forward. From a stopped position such as in my driveway or at a stoplight I will press the gas and it will not go into drive but it will rev up to about 3500. None of these issues can be duplicated by the dealership of course. At one point they finally changed out some type of component in shift mechanism and that worked for about a week then the problem started again. There is never a code indicating there is anything wrong although the trac light will randomly come on and not turn off. I have been driving for 30 years and know when a car is not driving properly. This is my 2D 4 runner. First was an '03 and had similar issues but since was less than a year old I finally convinced the dealership to replace the transmission at Toyota cost. This one was purchased used and has more miles on it but it seems to be the same problems as my original. The only way I have been able to get dealership to believe me is to ask the service manager to drive my vehicle for several days then they are like oh I see what you mean. Another incident was on a snow packed road. Travelling 10mph when the vehicle downshifted I lost control.

- Niceville, FL, USA

problem #4

Sep 142012

4Runner 6-cyl

  • 35,000 miles
I was driving into town (approx. 12 miles) and slowed to about 40 mph as I was approaching a stop light. I had to apply all my weight to stop the vehicle. The engine did not return to idle speed when I was stopped. I shifted to neutral and the RPM indicated 1500 revs. I kicked the gas pedal and the engine returned to normal idle speed, 700 revs. The floor mat was nowhere near the pedal. I can not find any recalls for this vehicle. Is there a fix for this problem?

- West Columbia, Tx, TX, USA

problem #3

Jul 142010

4Runner 6-cyl

  • 3,500 miles
The contact owns a 2010 Toyota 4runner. While traveling at 65 mph, the contact applied the brakes but they did not engage. The contact crashed into another vehicle. There were no injuries. A police report was available. The vehicle was taken to the dealer where the contact was awaiting repairs. There were no prior warnings of the failure. The current and failure mileages were 3,500. Updated 10/20/10 updated 10/16/10

- Cerrieos, CA, USA

problem #2

Mar 012010


  • miles
Toyota acceleration problems. You need to check emi (electromagnectic interference), rfi (radio frequency interference) on exact sites of problem. Instance of runaway, san diego, ca, subject East, interstate 8, you have miramar usmc airfield, also san diego airport, both have radar. Oregon city, or, subject had problems, after fix, numerous airfields there with radar. Just bought 2007, Chevy HHR, twice at exact same spot, event occurred and went away in less than 1/4 mile, highway 3, North bound, Massachusetts to New Hampshire, event occurred twice, engine coolant temp. Jumped 10 degrees F., went from 192 to 202 F. second time outside temp. Dic, (driver information center) monitor reported "ice condition", 32 degrees is needed for this to come on, 5 degree minus jump, 37 to 32 F., from Massachusetts, interstate 495 to route 3, temp was 36 to 37 F., the entire time. Manchester airport is in line of site from highway, route 3 North, at this location, faa control center near by. Problem could also be related to cell phone, repeater towers. Haven't come across any emi, rfi tests done on new cars, 2005 and up. My Chevy HHR has no shielding for this problem, no shielded cable that I can fine, on comm. Systems. My background, 20 years military electronics, retired msgt, air force reserve, 30 years commercial electronics, presently working for bae iews merricmack, nh. Propietary information, military and company (bae) status. No further transmission, with out, government or company approval.

- Northboro, MA, USA

problem #1

Feb 222010


  • 1,670 miles
February 22, 2010, my 2010 Toyota 4runner accelerated fiercely, my head was slammed into the headrest. I was at an intersection at the crosswalk; if a person had been in the crosswalk I would have killed them. The car went back to normal as suddenly as it accelerated. Terrifying! my head still aches. Took car to dealer and reported incident. The manager took a flash light and looked at the gas pedal and floor mat and said ¿it seems to be okay you have the "?" new pedal, but our mechanic can check it out if you like.¿ left car at dealership and received a call later that day that my car was ready and the master mechanic was not able to duplicate my issue and I can pick up my car. Sent emails to Toyota corporate; received a call from peter, senior rep and he said I could get a second opinion at another dealer. I explained I could have killed someone when my car accelerated through the crosswalk; he ended the conversation by saying someone from my local dealership would pick up the car and check it out again. February 25th a manager from Toyota came to my home and picked up my car to run more tests. March 1, 2010, my car remains at the dealership. The 2010 Toyota 4runner should be on the recall list.

- Lancaster, CA, USA

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