I will add that, while it might not be typical for everyone, I got a NEW pump from the local parts store for my 540i... it lasted less than 30 minutes run time... It puked bearings and pulley parts all over the ground... I got the OEM from BMW which only cost about 17 bucks more at the time... I sold it with that pump on the car...

Go with the OEM stuff!!!

Cheers!!

__________________
2001 E53 X5 4.4i (03-07-2001 build date) White exterior / hellbeige interior (6MT swap vehicle - Manny)
2002 E53 X5 4.6is (12-20-2001 build date) Imola Red exterior / M-texture interior (Red)
2003 E53 X5 4.4i (06-26-2003 build date) Silver exterior / Black interior (Silvester II)
2008 Mini Cooper S ragtop (04-17-2008 build date) Dark Silver exterior / Gray interior ( Topless)
BMWCCA member (#4745)