Bad Temp Sender?
 

Ok, I did a quick search and didn't come up with anything. My 2001 X5 4.4 has a temp gage that goes directly into the red. Basically, start the car (when cold) and for about 1 second it reads correct and then pegs. Is there an easy way to confirm its the sender? Also, where is it located? Any help is appreciated. Im sure if I keep searching but would appreciate some quick help. Thanks in advance!!

Sound like the Coolant temp sensor is at fault here.
Part 16 #13621433077
http://www.realoem.com/bmw/diagrams/i/m/239.png

Awesome! Thanks. Ill get one ordered ASAP!

Another question. I just ordered that sensor. I see it goes in the LWR Rad hose. Is there a head temp sensor or is the gage completely driven by the one in the LWR rad hose? Thanks, Mark

Post some pictures if you can, please. Cuz this morning I experienced the same symptom. Scared the shit out of me.

Check the coolant level, perfectly normal. Restarted it, and issue is gone. Drove the 45 min trip w/o any issue. Weird! :confused:

Where did you order your sensor? I'm about to order it from Bavauto.com, but not sure if they can beat the price you got. Let me know. thanks a lot!

Put the part# in Furiousmethod.com - BMW Parts Price Comparison and decide for yourself, LeiZ