AP01 Automatic Transmission Drive Axle Transfer Case compatible with RS3 AWD models from 2017 to 2020.This transfer case is designed for use with transmission model numbers 0CP409053H and 0CP409053Q.It supports all-wheel drive functionality and integrates with the vehicle's drivetrain system to distribute power between the front and rear axles.The unit is built to meet specifications for fitment and performance.It is intended for direct replacement in applicable vehicles without the need for modifications.Compatibility Statement: This is not an manufacturer part.Brand/model references are used for fitment guidance.