3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
Yesterday my outside temperature indicated 65 F and the next time I looked down it said 122 F. All of the information I have looked at usually shows a unusually low temperature like - 40 F. The sensor does not show any exterior damage. Do I just replace the sensor ?
I removed the sensor and found some water at the pin connectors. I dried it out, cleaned the pins and reasembled. With an outside temperature of about 65, it started indicating at 80 and over about 5 minutes climed back to the 122. I cleaned again but got the same results.
I ressembled everything but left the sensor out of the connector and covered it with electrical tape. Bought a new sensor for $30 at the local BMW dealer. They said that this sensor is a common falure.
I removed the tape, replaced the sensor and tested it in parking lot and it worked fine. Thanks for the help.
Note that the sensor can be removed and replaced without removing the fender well behind the fog light. Its a shame that some repair shops have charged above $100 for the sensor replacment.
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