Turbo Coolant Return Line, BMW - G30 M550i & G11 G12 750i

This part is listed by BMW as BMW part number 11539896892 (11 53 9 896 892) and is described as Genuine BMW Coolant Return Hose for the bank 1  and bank 2 turbochargers on 2017-2019 G30 M550i and 2016-2019 G11/G12 750i models. 

This part is manufactured by an aftermarket supplier of European auto parts, including many cooling components. While not carrying OEM status, this part follows the design of the original very closely and uses similar materials. An aftermarket part may even have the same TUV approval as its OEM counterpart. The brand may even be OEM to another manufacturer besides BMW. This aftermarket brand has a two year warranty - the same as Genuine BMW and OEM brands.