Genuine OEM Volkswagen collared bolt, part number N91145101. This fastener features an integrated collar to distribute clamping force and is used to securely mount structural or exterior components. It is designed for use in the rear assembly to ensure that parts remain firmly attached under operational loads. Genuine OEM bolts are engineered with the correct tensile strength and corrosion-resistant finish to maintain structural integrity and prevent loosening over the service life of the component.