What is the wineing noise in the Toyota Estima?

The whining noise in a Toyota Estima can often be attributed to issues with the transmission, such as low fluid levels or worn components. It may also arise from the Power Steering system, indicating low fluid or a failing pump. Additionally, belt-related problems, like a worn or loose serpentine belt, can produce a similar sound. It's advisable to have a qualified mechanic inspect the vehicle to accurately diagnose and resolve the issue.