Infotainment and phone connect system for hands free phone use is not operational. The computer for the system is in a continuous reboot loop. This puts safety or safety of others at risk as I cannot use hands free. Mazda corporate suggested that a software update of the Connectivity Master Unit (CMU) might solve the problem. I brought the car in to Smithhaven Mazda on 090722 for update. The repair technician could not update the computer software and advised customer that the possible CMU problem is cause of concern. I was then advised that resolution would be replacement of CMU at $700. Problem was first observed 082022.

- Huntington, NY, USA

In February, 2022, my 2015 Mazda 3 experienced a major failure, while I was driving on a local road, going 35 miles per hour. All of a sudden, the engine lost power, three warning lights came on, and the car was struggling to go 20 miles per hour. Being near a friend's house, I drove there. From there, her husband followed me home. The next day, my car was towed to the Mazda dealership. The mechanic diagnosed the problem as -€œfound TBS NUMBER: 01-014/16 and inspected coils found they were bad according to lot numbers-€. He replaced all four engine coils and all four spark plugs. The service manager told me that the parts were not under warranty. My research revealed that engine coils are supposed to last the lifetime of the car, which is 150,000 to 200,000 miles for a Mazda 3. My car only had 43,048 miles. The spark plugs should have lasted about five more years. I looked into the Bulletin issued by Mazda USA. Mazda USA was first aware of a problem January, 2016. On 17 March 2016, I bought the car. Mazda USA updated the Bulletin to include my car on 29 July 2016. The car was under full warranty at this time and could have been fixed, if I had been notified of the defects. The faulty coils can cause a catastrophic failure, resulting in serious accidents and injuries. My car was a -€œticking bomb-€, waiting to go off. I was on a local road, with light traffic, not a secondary road or highway, with heavy traffic. Rather than notify customers of the danger of the engine malfunctioning, Mazda USA chose to remain silent. The Bulletin directs that nothing be done until a customer complains. The customer does not know to complain until the car malfunctions! The customer must complain within the normal warranty period. Mazda is hoping that the bad coils fail after the warranty period.

- Shawnee, KS, USA

The multifunction / infotainment display in my Mazda went haywire last weekend--it loops through bootup sequence over and over but never loads. Backup camera still works, sort of, but the image jumps and it goes blank sometimes. I can't unplug the display or pull the fuse, or would lose backup camera altogether. So I have no Nav system, can't change radio station, etc.--and am stuck with the 7" screen flashing in my face as I drive. Local Mazda dealer advises that this is caused by cell phone transition to 5G. They took my contact info but did not offer any solution. There have been a couple of local news stories this week about other Mazda owners experiencing this issue. Interestingly, those all seem to report that owners' radios are stuck on a local NPR station. Mine is also stuck on one station, but not the NPR affiliate. https://www.geekwire.com/2022/youre-listening-to-kuow-like-it-or-not-mysterious-glitch-has-mazda-drivers-stuck-on-public-radio/

- Seattle, WA, USA

My cars infotainment system, which includes the rearview camera, started malfunctioning in early 2019. The infotainment screen (for the clock, radio, gps and rearview camera) was in a reboot loop (constantly rebooting over and over). When the car is put in reverse, the rearview camera works sporadically, including shutting off in the middle of reversing the car. I took the care to the original dealer and (per the service invoice attached), they diagnosed the problem as "cmu failure" which would cost me $1000 (one thousand dollars) to fix. I refused, as I did not think it was appropriate for the cmu to fail roughly four (4) years after purchase. I googled the problem and it's evident that many other Mazda owners have experienced the same problem.

- Alexandria, VA, USA

Infotainment system keeps rebooting in an infinite loop. Vehicle was parked when issue started. Vehicle had been off for about 3minutes prior to issue. Infotainment was working prior to being off for 3 min.

- Glendale, WI, USA

Infotainment system restarts 3 to 5 times, when first starting car, when temperatures in unheated garage are below 50 degrees. I drive four to eight miles, with heater on, before it stops restarting. Have taken to dealer 3 times, while under warranty. All they do is reboot it. Now the car is no longer under warranty and I refuse to take it back, and be changed for something that should have been fixed the first time. This just might be a deal breaker in buying a Mazda as my next car. Very annoying.

- Greer, SC, USA

Takata recall the infotainment system is going haywire, making ghosts selections such as calling ppl, self selecting settings and all other buttons at random times during driving which has become extremely distracting and dangerous to drive the car with this issue. This is apparently a known issue to Mazda but they refuse to fix it. All they will offer is swapping it for another infotainment system that will eventually do the same thing again at the customers expense. This takes place while the car is traveling at 5mph or less so it most frequently happens when I am slowing to take turns or traveling in my neighborhood and while at a stop at random times. I have no control over the system once it starts glitching and making calls and changing settings or dialing numbers, I cant hang up im forced to disconnect the bluetooth from the phone but that only prevents it from making calls it still continues to go to the setting at press random buttons

- Lawrenceville, GA, USA

Corrosion of the battery terminal and battery wiring harness preventing car from starting.

- Macon, GA, USA

Electrical malfunction in the brake system caused the vehicle to completely shut down. Caused problems with the remote communicating with the starter and all system malfunctions activated.

- Fpo, AP, USA

When pushing start button all lights go on but car won't start. Stationary in drive way

- Seattle, WA, USA

2015 Mazda 3. consumer writes in regards to no recalls being issued for defective parts on vehicle. The consumer stated he was not notified of any recalls for this vehicle. Updated 09/29/2017

- Indianapolis, IN, USA

Hot weather acceleration and blind spot monitoring system (bsm) issue: In extremely hot weather bsm off light turns on repeatedly while the vehicle is in motion or starting from complete stop. At the same time the infotainment system display flickers in sync with the bsm off light appearance. When this occurs there is a clicking sound coming from the front of the car/where the engine is located. The sound is accompanied by temporary loss of acceleration when in motion or starting to move from a complete stop. When this occurs while starting from a complete stop, the engine revolutions (rev) drops below 1K RPM despite gas pedal input thus the car would not move/accelerate for about 5 seconds. When it occurs when the car is in motion such as on the highway or merging onramp into the highway the car unsafely slows down despite gas pedal input. Again this issue is observed during unusually hot days eg. July 22, 2017 in St. Louis, Missouri.

- St. Louis, MO, USA

Turning to park her vehicle, in a parking lot, the vehicle suddenly accelerated and hit two parked cars in front.

- Tallahassee, FL, USA

The day was hot and I was in stop and go traffic with the ac set to 72 degrees in my 2015 Mazda 3 with just 21K miles on it. My car unexpectedly stalled and the check engine and charging system/battery lights came on briefly in the dash. I had to shift into park and push the button to restart my vehicle. The car's ECU/PCM did not set any codes and the problem has not occurred again since that hot day. This is a danger because the sudden loss of power could result in a rear end collision luckily I was in stop and go traffic. Dealer and Mazda have been slow to investigate this thoroughly. Feels like they just want to send me on my way without doing a thorough investigation of this issue.

- Germantown, MD, USA

Vehicle navigation display has multiple times while driving, unexpectedly restarted. Once was listening to radio, radio did not stop but system restarted. Other time, was on call, and system restarted but call did not disconnect, user on other end could not hear me and I could not hear them. When system restarted, call continued. Called dealer and was informed that there may be a system firmware update needed. Brought vehicle in, was told that no firmware update was available, and that they could not reproduce issue.

- Menlo Park, CA, USA

The contact owns a 2015 Mazda 3. the contact stated that the navigational system, the bluetooth function, and the usb system rebooted and failed. The vehicle was taken to a dealer on more than one occasion where the failure was undetermined. The manufacturer was notified of the failure. The failure mileage was 1,000. Updated 5/4/15

- Carlsbad, CA, USA