It actually crawls up over about 20 minutes of driving (from cold) and then pegs at 122*. While I have the bumper off I'm planning to trace it as best I can but, hopefully it's not a problem there. Do you happen to know the path the wiring takes? Since the sensor is on the left side of the lower grill I'm guessing it would go into the left fender and back towards a loom or the firewall. I replaced my expansion tank a couple of months ago, so I am hoping it didn't somehow get pinched and damaged over time from that.

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'01 740i Sport MKIV, Quad Brake Lights, Bi-Xenon retrofit, HID Fogs Dinan 7 Struts, Springs, camber plates, Intake, MAF, CAI, Throttle Body, NBT Retrofit, Strong Strut


'99 318ti Titanium Silver; '97 318ti Boston Green; '13 X5 3.5i Saphire Black Metallic
'84 633csi Black (sold); '88 325iC Black (sold); '97 740iL Black(sold); '01 740iS Black (sold);'97 318ti White (sold); '08 X5 4.8i Titanium Silver (sold); '96 318ti Alaska Blue (sold)