Mazda CX-9 multiple failures including water pump leading to engine damage and ongoing issues with transmission, axle, and fuel injectors after six months without the vehicle on Mazda CX-9

Some Mazda CX-9 owners report experiencing various concerning issues, including infotainment and GPS malfunctions, as well as problems with alternators and dead batteries. Additionally, there are reports of cylinder head cracking, which can lead to coolant leaks due to a compromised engine block. Concerns regarding brake performance and engine reliability have also been noted, with the CX-9 ranking 14th in overall reliability among Mazda models. Specifically, the 2009 CX-9 has seen brake booster failures, resulting in a significant number of complaints filed with the NHTSA. These issues, ranging from electrical failures to serious mechanical problems, can be costly to repair and may lead to ongoing complications if not promptly addressed. Owners experiencing multiple failures, including water pump issues that could cause engine damage, are advised to seek assistance from a qualified mechanic or Mazda dealership to ensure the safety and reliability of their vehicle.