Mazda MAZDA3 loss of power problems

Filed Oct 20, 2025 · Engine, Transmission · CA

What component or system failed or malfunctioned, and is it available for inspection upon request? The high-pressure fuel pump failed. This component failure prevents the car from starting or staying running. The check engine code confirmed the high-pressure fuel pump failure. The failed component is currently at the Mazda dealership and is available for inspection upon request. How was your safety or the safety of others put at risk The car suddenly stalled while driving on the roadway, creating a dangerous situation. If this had happened on the freeway or in fast-moving traffic, it could have led to a serious accident. Losing power and control of the vehicle at higher speeds poses a major safety risk to both the driver and surrounding vehicles. I was fortunate that the failure occurred on a city street rather than on the freeway. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The Mazda dealership inspected the vehicle and confirmed that the high-pressure fuel pump had failed, which was also verified by the check engine code. This failure caused the stalling and starting issues. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle was inspected by an authorized Mazda dealership, which diagnosed and confirmed the high-pressure fuel pump failure. It has not been inspected by police or insurance representatives. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Before the final failure, the car was hesitant to start, and after it stalled, the check engine light appeared. There were no prior warning messages or signs before the car suddenly stalled while driving. Additional details: The car is only seven years old with approximately 52,000 miles, and it is concerning that such a critical component would fail this early.

Filed Jul 26, 2025 · Steering · PA

Intermittently spanning several months, there is a sudden loss of power steering as the vehicle is in motion. Warning lights light up on the vehicle as power steering and power brakes are disengaged. Even though I provided a video of power steering loss, where a slight turn of the steering wheel engages this failure, where the dash board lights flash as power steering fails, the dealership will not fix anything they can’t duplicate in their shop. I guess they don’t believe their lying eyes, and don’t accept the video as proof of anything. It is doing exactly what it was recalled for back in September 15, 2010. Recall #10V374000. Mazda Corporate has been notified. Case # 00342901. There are known fixes for this problem. Mazda has done these repairs on hundreds of thousands of times. Dealership told me they will do nothing unless they can duplicate the problem. In reality it might take a month or more for this to show up at some unpredictable time and place. I have a potentially dangerous scenario awaiting me. Driving this vehicle in it’s present condition is recipe for a crash. This was a problem that Mazda addressed and fixed in the past. Being that it was done hundreds of thousands of times, I’m fairly certain that none of those fixes were predicated by mechanics having to see those issues in their shops before they did the repairs.

Filed Apr 23, 2025 · Engine · PA

Spontaneous loss of power while driving on highway. Check engine light came on. Speed limited by car. Continues to vibrate especially at idle from cold start. Code P0304 intermittently popping up.

Filed Jun 23, 2024 · Transmission · PA

Car started jerking and on the way home, the car lost all power to the transmission. The check engine light came on as well as the AT and traction lights. Absolutely no power to the transmission. codes P0780 and P0751.

Filed Apr 12, 2024 · Engine · NY

I have a 2017 Mazda 3 with exactly 59,454 miles. I was driving my car into work and a warning came on saying coolant temperatures high pull over immediately. I feel my safety was at risk since I was on a highway and my car lost power and would not allow me to accelerate. Loaded the car on a flatbed to bring into a Mazda dealership. I had oil leaking into my coolant. They diagnosed it as a cracked cylinder head or engine block. Only solution I was given was to replace the engine with a factory new engine. I spoke to Mazda customer service and they admitted it is a known issue.

Filed Nov 26, 2023 · Transmission · MD

Transmission Control Module malfunction. The AT light came on and the car made a jerking motion and a clunking noise. It lost power and would not shift which is very dangerous in moving traffic. It put me at risk for getting hit by another vehicle not expecting the abrupt change in speed by my vehicle. The check engine light is now lit up. There were no warning lights before the vehicle’s transmission malfunctioned. A code came up on the vehicle when tested. U0101 lost communication with TCM. From what I have read, researched, and have been told this issue is very common for certain years of Mazda 3’s including mine.

Filed Sep 2, 2023 · Fuel system · ID

My 2017 Mazda 3 (85,000 miles) suddenly had the engine light go on and a loss of power. I’m lucky I didn’t have an accident. I took it immediately to the shop and they informed me that my low pressure fuel pump is bad. I see they have a recall on Mazda 2018–2020 fuel pumps. However, I also saw a class action lawsuit attempt to include Mazdas from previous years because the fuel pump has the same number as those cars. I had just taken my car in for routine maintenance, spark plug change, and inspection at the dealership two weeks before this incidence happened and they didn’t report anything wrong with my car.

Filed Jun 27, 2023 · Fuel system · OH

I have a 2018 Mazda 3 hatchback 2.5l with a faulty fuel pump. I bought the car 1 year old with 2k mikes on it in 2019 from Jake Sweeney Mazda in Cincinnati ohio. They tell me the issue with power loss and stalling I need a new fuel pump it's failing cost is $1600 to repair. Then I learn a few days later on my own 121,000 2018-2109 Mazda 3 and others were recalled due to a faulty fuel pump with the exact problem I have manufactured by Denso. But I'm told my vin # isn't on the recall. The Denso fuel pump is the brand. However no one at the dealership in Cincinnati or Columbus ohio will tell me what type of fuel pump I have. When I went to the Columbus dealership I believe called Byer Mazda they told me an upgrade was done (which never happened) to my fuel pump. Unless Mazda stole my car and returned it no work was ever done on my fuel pump. Only oil changes. Could an upgrade NOT performed and my Vin was marked as upgraded but wasn't? Why do I have a faulty fuel pump withBthe EXACT symptoms on the EXACT model or EXACT year of my Mazda.. NO ONE at Mazda will tell me what brand fuel pump was manufactured in my car. Neither the dealerships or the 800# I call can saY what fuel pump was manufactured in my car. But they can say what was recalled based on vin#. The car just turned 5 years old and shouldn't need a new fuel pump. Isn't this all a little suspicious especially since they cannot conveniently for them say what manufacturer fuel pump is in my car. The car has lost all power and stalls. What happens when I pay the $1600 and the fuel pump is the Denso that is faulty. What then? No one will help. All of this is fishy as can be especially cause I own the EXACT YEAR BRAND AND MODEL WITH THE EXACT PROBLEM THE OTHERS WERE RECALLED FOR. Please say to yourself this is a little fishy and ask questions instead of going by a computer. As a human being look at this as highly coincidental and needs looking into instead of dismissing me.

Filed Jun 20, 2023 · Electrical · VA

Electrical system drains battery, have purchased several new batteries annually. With a new battery, the car while being driven, shut off, lost power steering and abs on road. Car has been parked since and battery drain still occurring while car is parked

Filed May 24, 2023 · Engine, Fuel system · FL

I was driving my car and it suddenly jerks a few times and the engine light turns on. i slowed down and then began to accelerate, and it was losing power and wouldn’t t go above 40mph - even while flooring the gas pedal. Now it won’t start at all. the lights turn on and everything else is fine, but car won’t start and after checking CEL, i’m getting the code p0192 indicating it’s Fuel Rail Pressure Sensor Low Input.