Toyota Avalon rusting around rear window vents due to water leakage on Toyota Avalon

Some Toyota Avalon owners report experiencing rust around the rear window vents due to water leakage, which can stem from clogged or damaged drainage hoses located beneath the rear quarter panels. Signs of water intrusion, such as mineral deposits or white residue on the dashboard, may indicate potential leaks that need to be addressed. Owners are advised to conduct water testing by pouring water down the trunk seams and back glass to check for leaks inside the vehicle, as well as running the AC blower on high with closed doors and windows. If rust is already present, it is crucial to promptly sand down the affected area, apply rust converter, and repaint to prevent further corrosion. For persistent issues or uncertainty about the damage, seeking assistance from a professional mechanic or auto body shop is recommended to ensure appropriate repairs are made.