TEMP. GAUGE ISSUES on 2000 BMW 528i

TEMP GAUGE SHOOTS FROM LOW TO HIGH. I SHUT THE CAR OFF THEN IT SETTLES AT A REALLY LOW TEMPERATURE. THERMOSTAT,WATER PUMP,RADIATOR,HOSES,OVERFLOW BOTTLE HAVE ALL BEEN REPLACED. PLEASE HELP

by in Trenton, NJ on November 10, 2010
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1 answer 1 comment
ANSWER by , November 10, 2010
check the fans.these autos are also known for bad water pumps.replace the thermostat if its old.
COMMENT by , November 11, 2010
thanks. but all the above have been changed. could it possibly be the temperture sensor that has gone bad. what are my chances on that??? also how should i test the fans,they look like they are working????