AC / DEFROSTER / HVAC I am reporting a potential safety and health defect involving the HVAC system in my 2024 Acura MDX. When operating the air conditioning or the front windshield defroster, a strong musty odor enters the cabin. The dealer informed me that resolving the odor requires an EVAP core cleaning, replacement of the cabin filter, and the use of a disinfectant that will be circulated throughout the ventilation system to kill mold, mildew, and other contaminants. I was told this is the -??first step-?? in addressing the issue and that the estimated cost is $440 out of pocket. This is extremely concerning because the presence of mold or bacterial contamination inside the HVAC evaporator and ventilation system affects the air my children and I breathe inside the vehicle. Mold exposure can cause respiratory irritation, allergic reactions, headaches, and other symptoms, especially in enclosed spaces. The HVAC system in this vehicle is a sealed, manufacturer-controlled system which the owner cannot access or service, so this type of contamination should not be considered routine maintenance. I have researched this issue and found that Honda/Acura vehicles have a documented history of HVAC mold and mildew odors, and Honda has previously issued internal investigative bulletins requesting dealers to collect parts from vehicles with musty HVAC smells. There are also mold-related complaints already filed with NHTSA for the 2024 MDX model year. This suggests the possibility of a broader engineering or design issue. I need this issue addressed immediately for health reasons, and I may have to initially pay out of pocket to ensure my family-??s safety. However, I believe this is a safety-related defect that Acura should be responsible for correcting, not the customer, especially on a relatively new vehicle still under warranty. I am requesting that NHTSA document this case and consider evaluating whether a pattern of HVAC mold contamination exists in newer Acura vehicles.

- San Jose, CA, USA

Front sunroof panel spontaneously exploded while driving on the interstate highway. No impacts or other things touched the sunroof. Vehicles behind had to avoid large portions of the sunroof panel. Flying glass made it dangerous to quickly leave the highway. This is a 2024 mdx with less than 30,000 miles. Never been in an accident before.

- Darlington, SC, USA

Heard a loud -??pop-?? while sitting in parked car. Radio volume spiked up and the passenger side of windshield was shattered. Clear defect in installation.

- Sicklerville, NJ, USA

Unknown. Constant creaking and rubbing sound when turning wheel and tires. Acura refuses to look into it more. Not a normal sound for a car less than two years old. Continues to happen everyday since two eeeks after I bought car. Have taken it to Acura multiple times for weeks at a time

- Jacksonville, FL, USA

Acura MDX Sunroof Explosion striking my wife face and glass going into my kids 5 and 3 car seats. The dealer nor American Honda are not taking accountability for it.

- Woodbridge , NJ, USA

Rear storage compartment is collecting lots of moisture. This area is growing mold on the carpet and lid. Not sure if there is a faulty drain issue or the manufacturer failed to insulate this area properly causing major condensation. This is a serious health hazard concern as occupants are now exposed to mold. Vehicle is scheduled to go in to the dealership to test for water leaks 2/21/25. Until we get into the dealership, from my observation it appears to be an issue with condensation from improper insulation/engineering.

- Scappoose, OR, USA

I purchased my new vehicle (2024 Acura MDX) in September 2024. On December 20, 2024, my SUV was on but in the parked position when the lights on the dashboard started flashing. I had the suv towed to Paragon Acura, where I was informed that the PCM had internal failure due to a circuit shortage. There were not any vehicle issues prior to the issues on December 20.

- Brooklyn , NY, USA