WATER LEVEL SENSOR FOR ALL SAAB 9000 INC CSE CDE GRIFFIN AERO CS CD MODELS EASY REPLACE - UNDO THE EXPANSION TANK AND GENTLY PRISE THE SENSOR OUT OF THE UNDERSIDE ... DISCONNECT PLUG THE NEW ONE IN 7554348 OE REFERENCE 01582 499777 I can be contacted until 10.00pm most evenings and weekends for support or advice