Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


really awful
Crashes / Fires:
2 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
32,816 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 Mazda MAZDA3 engine problems

engine problem

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2010 Mazda MAZDA3 Owner Comments

problem #10

Oct 082015


  • 120,000 miles


Gas pedals is sticky when flooring it. It will stay at the maximum acceleration position forever or the gas pedals is stick with the floor forever. The only way to get out of it is to manually pull it back. The sticky gas pedals will lead to unintended acceleration incidents. I believed this is a common issue with year 2010 Mazda3 5 door.

- West Roxbury, MA, USA

problem #9

Feb 152015

MAZDA3 4-cyl

  • 32,000 miles
Drove 80 miles to destination on freeway using cruise control. Car accelerated above cruise setting on downhill - did not engine brake to hold speed. When pulling into destination hotel parking spot and with right foot on brake, engine revved dramatically. Applied both feet to break. Automatic transmission. Changed gears to N, R & P, but engine continued to rev. Turned engine off. Smoke generated from engine entered cabin. Did not use car until next day. Returning home next day used cruise control and exited freeway for break. Slowing down for stop light with car ahead and foot on brake when engine revved again as before. Shifted car into neutral and turned off car then back on. Drove car to dealer on way home without another incident. This dealer is where we purchased the care and all work except tires/alignment and battery occurred. They examined and inspected the car and kept it for the next 10 days logging 200 miles without a recurrence of the unintended acceleration.

- Portland, OR, USA

problem #8

Oct 012014


  • 90,000 miles
The contact owns a 2010 Mazda Mazda3. The contact stated that the cruise control sensor illuminated. The vehicle was not inspected or diagnosed. The VIN was not available. The manufacturer was notified of the. The approximate failure mileage was 90,000.

- Hewitt, NJ, USA

problem #7

Nov 112010

MAZDA3 4-cyl

  • 5,000 miles


Many times but sporadically over the last two years my Mazda 3, when coming to a stop and foot firmly on the brake will have a sudden surge in RPM between 1200-2500 RPM and try to accelerate. Seems to happen most often first thing in the morning more often. Because I am constantly ready there has been no crash, though the time rpms reached 2500 I had difficulty stopping the car, on a freeway on ramp where sudden deceleration was needed. I have found that one pump of the break alleviates the problem if there is room to do so.

- Renton, WA, USA

problem #6

Feb 202012


  • 24,000 miles
On 2 occasions I was completely stopped, for a red light and stop sign, when the engine revved on its own and the car lurched forward. Felt like I was pushing brake pedal through the floor to stop it but it recovered on its own after several seconds. Very scary. I am afraid of hitting a car or someone. At the Mazda dealer now and has been for a week as they try to find out the problem.

- Spencerport, NY, USA

problem #5

Jun 172010


  • 600 miles
The contact owns a 2010 Mazda3. The contact stated that while the vehicle was idle, it would lunge forward and the rpms would increase. The failure occurred intermittently. The contact was forced to push the shut off button to stop the vehicle from moving forward. The vehicle was taken to an authorized dealer who could not duplicate the failure. The vehicle was not repaired. The manufacturer had not been notified. The VIN was unavailable. The current mileage was approximately 14,000. The failure mileage was 600.

- Bristol, NH, USA

problem #4

Nov 042010

MAZDA3 4-cyl

  • 49,000 miles


On 11/4, I was on my way to meet my yoga classmate for lunch at 1917 bistro. The restaurant's parking lot was full. So, I backed out and circled the block to find another parking space. When driving on livernois I noticed a parking lot that's why I decided to go back around. I pulled into the first empty parking lot which I thought was better than trying to parallel parking in the one space on the street. So, I turned into a graveled parking lot. I made a left then began to pull up to the parking space but the car accelerated and smashed into a building. The car would not stop so I shifted the car into reverse. The car jerked back wildly; it was hard to handle but I got the car to stop. A man came out of the wig shop. I was standing outside of the car examining the damage - white paint from the building and a slight puck on both sides of the bumper. The man looked at me incredulously because he said the impact shook theshop. His mouth was open and it took him a few minutes to close it. A woman came out also because she felt the impact in the shop next to the man's shop. There were no witnesses to my acceleration problem. I did not report the incident because I did not see a police officer (it's detroit). After lunch, I drove back home and sent Mazda an email. I heard from Mazda Friday morning. The car was towed to the dealer in troy. I spoke to amir about the incident and told him that the car was on its way into the dealership (by the way, I even have my oil change at the dealership). When the car arrived I received a call from scott bryant who, in an accusatory manner asked me to repeat what happened despite amir telling him my story. He warned me that it will take all afternoon to look at the car. Scott called later to inform me that a field engineer will be coming in on Monday to look at the car. He did not offer me a rental.

- Detroit, MI, USA

problem #3

Oct 292010


  • 4,500 miles
Cruise control turns off when going down hills, even small ones. I use my cruise control daily and my drive to work contains many small hills. When cruising at 70, I go down a hill. The cruise control backs off then at the bottom of the hill, it fails to engage. Once I have drifted from 70 mph down to 60 mph, it turns itself off. I've had my car 2 months and this has happened 11 times now. The dealership claims there isn't anything wrong and the only way it can turn itself off is if I touch the brake or the clutch. I am doing neither. When on a busy highway, and this begins to happen, the people behind you get very angry. Beside the fact I have begun slowing down without my brake lights coming on. There are others with the same problem here

- Lawndale, NC, USA

problem #2

Jun 032010

MAZDA3 4-cyl

  • 1,800 miles
I was stopped with the car running in drive and stepping on the brake pedal only, when the engine began revving uncontrollably. This resulted in increasingly high rpms, and it felt as if the car was about to lurch forward. I ended up turning off the car, and re-starting it. This is an intermittent problem that has happened a total of 3 times, each time while in a stopped position. I purchased the car the end of March 2010. First occurrence happened prior to 6/3/10, and the third, most recent occurrence, happened on 8/26/10. Mazda has installed a data recorder to attempt to record the problem, but now they want to remove it before the problem has re-occurred.

- Seattle, WA, USA

problem #1

Apr 242010


  • 1,260 miles
While driving slowly through a community center parking lot, the automobile suddenly accelerated and did not respond to braking, resulting in a crash into a brick wall.

- Arlington, VA, USA

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