Manufacturer: Delphi. Part Type: Engine Coolant Temperature Sensor. Engine Coolant Temperature Sensor. 1999 Volkswagen Passat Engine: 1.8L L4; From Chassis # 3B-X-491 581; with 4 Pin Connector;. 1999 Volkswagen Passat Engine: 2.8L V6; From Chassis # 3B-X-491 581; with 4 Pin Connector;.
