OE Part number 17417504732
Thermotec PN D9B004TT
This is a V8 fan and will suit the 502 348 Topran or Trucktec 08.19.104 Viscous Hubs.
You could also use this in conjunction with the viscous hub and Water pump on your M57N2 if you wish to convert it to a Viscous fan rather than run thermos.
