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[bmw] Re: E34 Coolant Level Sensor



Dunno about your e34, but if it's like my 88 e28, the
sensor is a reed switch inside a tube with
a ring magnet mounted on a cylindrical plastic float
that floats up and down around the tube depending on
water level.

The reed switch can be corroded or broken, or that
magnet isn't strong enough to close/open the contacts
for whatever reason.

But since you had it replaced, i can only think of
the connector pins being bad/corroded, or the
connector connection on either end is broken.

aaron
88 e28, 90K miles
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