Genuine OEM Volkswagen Tunnel Insulating Sheet, part number 5Q0825661BM. This insulating sheet is designed to protect underbody components, specifically those along the vehicle's central tunnel, from heat generated by the engine and drivetrain, as well as from road debris. It is installed on the underside of the vehicle. Made from durable, heat-resistant materials, this part acts as a vital thermal barrier. Genuine OEM insulating sheets are manufactured to precise specifications, ensuring correct fitment and effective protection for underbody systems.