^That's really good mileage out of an M54 water pump. They typically last 100k-120k.

I have a replacement N62 water pump that is going in soon sitting on the shelf... along with a whole host of other common problem parts. Xover pipe, thermostat, cooling hoses, VSS, alternator gasket, timing cover gaskets, motor mounts, etc, etc. I would guess $1000 worth of parts.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)