Just wanted to say thanks for the write-up. I replaced my water pump and thermostat on my E70 this past weekend after getting a P0128 CEL. The instructions made things a lot easier and faster (still took me 10 hours though, lol). Things that I noticed was I didn't have a coolant drain plug so I had to detach a radiator hose to drain the coolant. Universal joint sockets and extensions is a must. Going through wheel well is necessary.

Do I need to reset the cel light with a code reader or does it automatically go away?

Thx,

Doug
2008 BMW X5 3.0