M3 Coolant Light Problems

[1990m3]

Damn coolant light on the check panel keeps going on at random times. Usually if it does go on it will after the car runs for about 30 seconds. I have plenty of coolant. I just replaced that hose between the valve cover and the intake plenum that gets bad, and I replaced the fan clutch. Everything else seems to be in good shape, I don't lose any coolant from the reservior tank, is it the sensor? That's the only thing left I can think of. Anyone have any ideas?

[Han]

if the light's on, and there's coolant in the tank it can only be one thing.
change the sensor: $18.11 at the partsbin.com

http://catalog.eautopartscatalog.com...ensor&usemake=

[mrsha007]

hahha man everyone has that problem. that dam coolent sencor sucks ass. ive drivin 3 e30 m3's and all of them including mine have that same problem

[e30 325is]

My friend's m3 has the same problem. Just replace the coolant sensor and it should be fixed.

[CleanAzzE30z]

When youve been particularly throwing ther car around, the water dips below the sensor level and goes on because of the G forces, but when you turn the car off, and re-start it, it dissappears. Dont worry about it,m its a faulty sensor. At worst, your sensor could be playing as cruel trick to you and dissappearing and reappearing when you check it just to f*ck with you. jk

[1990m3]

I'll replace the sensor I guess, that is what I thought it would be, figurd I should check with some other people too though.

Oh, and the light only goes on when I start the car, will stay on until I turn the car off, sometimes it does sometimes it doesn't. So damn annoying I want to rip that check light out of there

Dave

[Cone]

Yeah my friggin light goes off at random times, it thinks my license plate light is out sometimes, hate that!!