Mazda CX-9 water pump failure requiring costly replacement due to engine location on Mazda CX-9

Some Mazda CX-9 owners report experiencing significant issues related to water pump failure, particularly around the 90,000-100,000 mile mark, which can lead to repair costs of up to $4,000. This problem is exacerbated by the need to replace the entire engine due to the water pump's location within the engine, resulting in high replacement expenses. When the water pump fails, owners may face coolant mixing with oil, which can lead to catastrophic engine damage and inadequate lubrication of critical components. This can manifest as warped cylinder heads, blown gaskets, or even a seized engine. The critical role of the water pump in engine performance highlights the risk of overheating and potential breakdowns if it fails.