Toyota Highlander water pump failure causing noise under the hood with multiple mechanic consultations on Toyota Highlander

Some Toyota Highlander owners report experiencing a noisy water pump, which may indicate a failing bearing that produces a rattling sound under the hood, often near the passenger side dashboard. After consulting multiple mechanics, some owners are advised that replacing the water pump is necessary to resolve this noise issue. Additionally, water pump failure can lead to coolant leaks, prompting the need for inspection of related components such as coolant hoses, the radiator, and the thermostat. Unusual noises like whirring or squealing can serve as early warning signs of water pump problems. It is crucial for owners to address suspected water pump failures promptly to avoid further engine damage.