audi a4 97-02 plate. if your car overheats or your gauge just says that on your dash board, no worry- 7 out of 10 audi have same problem , no its not thermostat or radiator blocked, there is a water temperature sensor just behind an engine near the front window. it costs about 5-10 pounds and its fairly easy to change if your audi is a non turbo or non diesel model. hope i helped. this goes to all VAG motors between 1996 and 2003, inc: bora , passat ,golf, audi a6 , a3. they all have to be 4 cylinder motors otherwise the sensor is gonna be in a different place.