Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2012 Mazda Mazda3 owners, lightly cleaned up (personal details are redacted by NHTSA).
My wife was driving on the freeway - I was on the passenger side. This is the first time it happened. The car lost sort of reset itself - dash warning lights came on (according to my wife). Radio/cd stopped music - ABS light went on (that's all I can see from passenger side). My wife said others too but she was focused on the road because it was a construction zone. She was nervous and said the car was not responding to throttle. Luckily all went back to normal after 2 or maybe 3 seconds. The music came back on also. No check engine light or any sign of trouble. We pulled over and I checked the front to see if we hit something that could have caused it. Restarted the car - all seemed normal and reached our destination. This was our first 200 mile trip or more on this car. 1 day after arrival - I did a once over safety check (fluids, tire pressure, etc) nothing out of the ordinary. …
I purchased my 2012 Mazda 3 one year ago (2017). I first noticed the issue about a month after owning my car. I turned on my air conditioner at first low, then all the way up, it felt slightly cool, but only as if my fans were blowing and nowhere near what an air conditioner should properly feel like. This was after letting the car warm up, and driving on back roads or highways as well as when parked. I brought the car back and the technician had some trouble figuring out how to fix it. The ac compressor was replaced, and yet I am still now dealing with a car that will not blow cold air! Only semi cool on the highest fan setting ! Also when accelerating and having the air conditioner on my car does not accelerate as well or feel as though it is driving as well as it does without needing the air conditioner on. My car really feels like it is working extra hard to put out semi cool air. …
When decelerating, I'll push in clutch, apply brake, and shift to a lower gear. As I let out the clutch, car will sometimes lurch forward (as if I'm depressing accelerator even though I'm not). I must immediately depress clutch again and let out slowly to prevent the sudden surge in acceleration. Most often happens when I am coming out of a turn and begin to let out clutch. Also, at 3 1/2 years old, with 95,000 mostly highway miles, manual transmission has started popping out of 4th gear while driving. I'll be driving along and for no reason shifter will pop out of gear. Independent transmission shop said cause is likely bad bearings inside transmission and recommended replacement with manufactured transmission. I never had problems with my 2010 Mazda 5 with 5 speed manual transmission. …
Tl* the contact owns a 2012 Mazda 3. While driving at an unspecified speed, the check engine indicator illuminated. The vehicle was taken to jenkins Mazda of ocala [phone], located at 1740 sw college rd, ocala, fl 34471) where the fuel pump and gauge were replaced. The clutch was replaced six moths later. Five months later, the vehicle leaked fluid in the driveway. The vehicle was taken back to the same dealer where the technician diagnosed and replaced the driver's side transmission axle. Seven months later, while driving approximately 5 MPH, the vehicle made a clunking sound and was towed to the same dealer where the technician diagnosed and replaced the entire transmission. The manufacturer was made aware of the failures and offered to provide a discount towards the cost of a new vehicle. The offer was not acceptable. The contact's vehicle was not repaired. …
Cruise quit working, traction control light came on and shortly thereafter the check engine light came on. Then all the lights on the dash started flashing and went into limp mode. Car decelerated and I pulled over to the side of the road. Turned car off and then it wouldn't start. Waited about 10 min and restarted successfully with the check engine and traction control light still on. Drove another 70 miles going in and out of limp mode with dash lights flashing on & off. Took to dealer and replaced the angle (sp?) sensor in steering wheel. Dealer reset all codes and it's done it twice since getting car back, dealer can't figure out what's wrong. Have to go in and have the codes reset every time to get it back to running again.
I just got off work and got in my car to leave. I turned on the car and everything seemed normal. I pulled out of the parking lot and as soon as I pulled up to the light, which was 1block away, my car shut off. I was just at the red light waiting then my car turned off and would not turn back on. All the power in the car was there but my car would just not turn back on, my vehical was being operated in the automatic position.this was dangerous because it was a Friday afternoon during the 5 o'clock traffic and I had all these vehicals lined up behind me honking and I had to push my vehicals off to the side and call a tow truck. My vehical was luckily on the city street.
There is a problem with the variable valve timing system causing reduced acceleration performance. The check engine light is displayed. This problem is exactly the same as the recall on Mazda3 vehicles manufactured between July 2011 and November 2011. The car lost acceleration and a vehicle behind me almost rear-ended my vehicle. For some reason Mazda is not recognising the recall on later models affected by the same issue. Mazda recall reference is 6511K. The recall should be expanded to cover additional vins
In the morning of March 31, 2017 when I've proceeded to va 206 to the naval lab (25-mile speed limit zone), traction control system (TCS/dsc) indicator light suddenly lit up, and car stalled. I attempted to accelerated but received non response from the car. The car stayed around 20- 25 MPH. I pulled in the auto shop and turn off the engine. I re-started the car and the TCS/dsc indicator light was off and car behaved normally. However I don't know if the problem will happen again.
Tl* the contact owns a 2012 Mazda 3. The contact stated that the vehicle leaked fuel. The vehicle was taken to green Mazda [phone], located at 3760 s 6th st, springfield, il 62703) where it was diagnosed that a charcoal canister filter was loose and needed to be tightened. The manufacturer was not made aware of the failure. The failure was repaired. The failure mileage was approximately 142,000.
The car sometimes surges during downshifting. I will be driving in moderate traffic in third gear. The traffic slows, and I let in the clutch and apply the brake. When the traffic starts to pick up again, I am going too slow for third, so I shift into second and let the clutch out. My right foot is just resting lightly on the gas pedal. The car has not been idling fast, but as soon as the clutch is engaged, the engine suddenly roars and the car leaps forward, even though I have not pressed the gas at all. I let in the clutch again to avoid an accident. When I let it out again, it works normally. This happens once, twice, or not at all in a 40-mile round trip out of town and back. It also happens frequently when I make a left turn without stopping, but where I need to slow and downshift. …
Engine complaints in other Mazda3 years
Frequently asked questions
How common are engine problems on the 2012 Mazda Mazda3?
NHTSA has 36 complaints about the engine & cooling of the 2012 Mazda Mazda3, 16% of the model year's 226 complaints. The component named most often is exhaust system › emission control (1 mentions).
Is there a recall for 2012 Mazda Mazda3 engine problems?
No. NHTSA lists no engine & cooling recall for the 2012 Mazda Mazda3, though it has 1 recall for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2012 Mazda Mazda3 engine problems start?
Half of the complaints with a recorded mileage happened before about 19,000 miles, and 57% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.