coolant temp light came on my 2003 540i

[Richardsoner]

Hey guys,I have a 2003 540i, my coolant temperture light came on. any ideas? I noticed that my coolant fan did sound a little odd also. I checked for any coolant leaks and there were none. My coolant level is fine because I checked it. I cant figure this one out.....It only happened when I was parked, if anyone know what it could be let me know.

I was told it could be my Coolant fan but I need a second opinion.

Thanks guys,

Richardsoner

[Doc325i]

What did your coolant temperature light look like?

[P11]

What did your coolant temperature light look like?

+1, I'm almost 100% sure E39's only have a coolant level warning.

[f10_M550i]

There is a Coolant Temperature and Check Coolant Level Warning. It's not a light, the words show on the display. The coolant level /temperature sensor sensor sticks up from the bottom of the coolant overflow tank. I'd consider replacing it, although your coolant temperature gauge should also be pegging.

[P11]

There is a Coolant Temperature and Check Coolant Level Warning. It's not a light, the words show on the display. The coolant level /temperature sensor sensor sticks up from the bottom of the coolant overflow tank. I'd consider replacing it, although your coolant temperature gauge should also be pegging.

I always thought the overflow tank only held the coolant level sensor, whereas the coolant temp sensor was located on the top left corner of the radiator.

[NNY528I]

I always thought the overflow tank only held the coolant level sensor, whereas the coolant temp sensor was located on the top left corner of the radiator.

it is.

[Corradokid135]

Is your radiator fan spinning at idle? Fan clutch could be toast if not.

[Richardsoner]

yes it is spinning idle, it is not as loud as is use to be. i am in Jacksonville NC, near Camp Lejeune on business. is there any well respected BMW shop around here that anyone knows of. I only have a week here so I have take care of this ASAP.

Thanks again

Richardsoner

There was a Coolant Temperature and Check Coolant Level Warning. my mistake. what appeared was a warning. the fan is running kind of crazy, i checked it this morning. how far can i drive to get it fix if I got to drive it to the shop

[jeffmilarsky]

Two other things:

You might need:
New Bleeder screw
or
New Expansion tank cap

Both of these should be checked.

best,
Jeff