About a year ago,
BMW - R7132.13 (waterpump)
Goldwagen - R4450 (waterpump)
And just remember that if you have the N52 motor that it might be a good idea to also replace the thermostat as it is also a contributor and a heck of a job to get to.
thermostat prices
BMW - R1648
Goldwagen - R1100
But remember these prices was before and might be little more than these, buy the pump from goldwagen and the thermostat from bmw. :rollsmile: