1995 Audi 90

Engine Cooling problem
1995 Audi 90 6 cyl All Wheel Drive Manual 140000 miles

I have been getting little to no response from the engine temp and oil temp gauges and a check engine light for the coolant sensor (and for some reason the speedometer). I am panning on replacing it (~$30) but would like to make sure its not a bad connection forst. Where is the ect sensor and what does it look like?
December 12, 2008.

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