Premature AC refrigerant leak and failure in system in the 2021 Toyota Highlander due to corroded/defective rear AC lines located near the exhaust/spare tire, observed at very low mileage and upon official inspection at the nearest Toyota dealership. Noticed early in ownership and decided to have the vehicle scanned when air being released only continued to grow warmer in the sweltering summer months. Reporting due to advice from friends and owners in my exact situation with the very same issue as well as the pricey three-thousand dollars and upwards quote to have this work done from Curry Toyota, 3026 E Main St, Cortlandt, NY 10567. Vehicle purchased new to avoid these very issues.