One problem related to loud engine noise has been reported for the 2014 Mazda CX9. The most recently reported issues are listed below.
The contact owns a 2014 Mazda cx-9. While driving 45 mph, the contact heard an abnormal noise and detected a strong odor inside the vehicle. The vehicle was coasted to the side of the road and taken to an independent mechanic who found an internal fracture of an oil leak. The mechanic stated that the transfer case may need to be replaced. The dealer (quirk Mazda, 111 mcgrath hwy, quincy, MA 02169, (617) 773-8000) was contacted and indicated that there was no recall campaign to provide a remedy from the manufacturer. The manufacturer was notified and stated that the vehicle was not included in a recall. The VIN and failure mileage were not available.