This part is listed by BMW as BMW part number 11511713266 (11-51-1-713-266) and is described as Water Pump with Metal Impeller for E39 540i (1999-2003), E38 740i/740il (1999-2001) and first generation model X5 V8 (E53 chassis) including 2000-2003 X5 4.4i and X5 4.6is.
This water pump fits 1999-2003 BMW models that used the M62 4.4 liter and 4.6 liter V8 engines. It's a very common failure item on these vehicles, and can leave you overheating and stranded. This design by Graf features a metal impeller that is stronger than the stock plastic composite design.
This part is manufactured by an aftermarket supplier of European auto parts, including many cooling system 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.
Supersedes BMW Part Number 11510393336 (11-51-0-393-336)
E39 (97-03) > 540i
E38 (95-01) > 740i
E38 (95-01) > 740iL
E31 (91-97) > 840Ci