5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
Yesterday I got a automatic car wash and as I was driving away the temperature gauge went straight into the red. After a couple of minutes, while driving home, it went back to normal and then back again. I got no CEL so there is no code for me to check. I seem to remeber reading a tech article in Roundel that mentions an eratic temp gauge problem with the E39. Any thoughts?
Update: Well since the car has 93,000mi on it I changed out he thermostat and water pump - changed the belts too while I was there. The parts are fine. The thermostat works fine (drop it in boiling water). And the pump has metal impellers - which would be plastic if it was original, it also turned fine. So it's either the sensor or the gage or voltage interference.
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