2022 Mazda MAZDA3

The vehicle's Connectivity Master Unit (CMU) / infotainment system has experienced a complete, permanent internal electronic failure, logged by Diagnostic Trouble Code DTC U3000:49 (Control Module Internal Electronic Failure). The main display screen is completely dark at all times and never powers on or responds. The unit is available for inspection upon request. This total hardware failure creates critical safety hazards: 1. Non-Compliance with FMVSS No. 111 (Rear Visibility): Because the rearview camera relies entirely on the main display screen, the backup camera is 100% inoperative. When shifting into Reverse, the screen remains black, offering zero rearward visibility and creating an immediate backover risk to pedestrians, children, and property. 2. Complete Loss of Driver Assistance & Emergency Systems: The permanently dark display eliminates access to active safety guidance, rear cross-traffic visual alerts, parking distance indicators, turn-by-turn navigation, and hands-free emergency communication interfaces. 3. Ongoing Driver Distraction: Operating the vehicle without essential safety/navigation displays requires additional driver focus, causing persistent cognitive distraction. The failure was confirmed via professional OBD-II diagnostic scanning showing DTC U3000:49, which explicitly denotes an unprovoked internal component failure rather than wear and tear. The manufacturer has declined to repair or replace the failed assembly out of warranty.

“My 2022 Mazda 3 is experiencing an ‘in-network malfunction’ related to the vehicle’s internal communication system. Multiple technicians have told me this is an internal vehicle network/communication fault, not caused by wear or damage. The dealer refuses to repair it unless I pay out-of-pocket, even though this appears to be a manufacturer defect in the electrical network system, (TCU)This malfunction affects the reliability of the vehicle’s electronics and could impact safety systems while driving. Mazda has not taken responsibility for diagnosing or repairing the issue, and I believe this defect needs to be investigated, as other owners may be affected as well.”

Car doesn't start if sitting more than 4 days untouched. When i went to the dealer, they informed me they know about the issue but nothing can be done about it. They even told me what the issue was, there's something in the car (they don't know what) that draws a lot of power non stop. kills the battery and some time will get stuck mid ignition. I've replaced the battery a few times as well. It's very stressful trying to deal with it after a 12-16 hour shift at work. knowing it will happened again and again, over and over.

Purchased the car new in April 2022. They have replaced the battery twice in the last year. They now tell me that there are no replacement batteries made for my vehicle and have acknowledged a problem with the battery made by Johnson control. The battery will not hold a proper charge after the vehicle is shut off. They have offered a loaner car but cannot tell me how long it would take to resolve the issue. In order to drive the vehicle I have to carry a jump pack in the car with me in case the battery goes dead and will not start.

The same or similar issue is described here: https://static.nhtsa.gov/odi/tsbs/2022/MC-10209787-0001.pdf Essentially, this issue has to do with the wiring under the seat that is responsible for airbag functioning. Adjusting the seat caused "Airbag Malfunctioning" alarm/notification to go off on a numerous occasions. Potential risk with this issue is that the airbag may deploy randomly or not deploy at all if collision happens. The vehicle has been inspected by vehicle who is working on the repair. However, the vehicle has been waiting for spare parts for 3 weeks now.