Low Coolant light/ expansion tank sensor?

rlubocki · 04-11-2017, 04:36 PM

Is there any way I can check if it is the expansion tank sensor causing the low coolant light on the dash? If I unplug it or close the circuit will the light be affected? I have a 2004 Z4 3.0, and found the sensor, but it looks all plastic, compared to original? Can I replace it without draining all coolant?

RichZ4 · 04-11-2017, 07:41 PM

You should change the tank and the plate it mounts to. There's a float inside the tank that works the sensor.

04-11-2017, 04:36 PM	#1
rlubocki New Member 3 Rep 15 Posts Drives: 2004 Bmw Z4 3.0i Join Date: Sep 2008 Location: Pennsylvania iTrader: (0)	Low Coolant light/ expansion tank sensor? Is there any way I can check if it is the expansion tank sensor causing the low coolant light on the dash? If I unplug it or close the circuit will the light be affected? I have a 2004 Z4 3.0, and found the sensor, but it looks all plastic, compared to original? Can I replace it without draining all coolant?
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04-11-2017, 07:41 PM	#2
RichZ4 New Member 10 Rep 26 Posts Drives: Z4 coupe 3.0si Join Date: Feb 2017 Location: Florida iTrader: (0)	You should change the tank and the plate it mounts to. There's a float inside the tank that works the sensor.
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