Tools And Equipment: E36

The Fresh Air Inlet Valve (1) must be closed when checking the fuel tank and ventilation system for leak-tightness.

Fig 1: Identifying Air Inlet Valve

Disconnect plug connector (2) and install Special Tool # 88 88 6 126 410/411.

Connect the other end of the tool to the vehicle battery to power the valve closed during testing.

Fig 2: Identifying Ultrasonic Leak Detector

• Fuel Filler Cap and Filler Neck 
• Fuel Tank Ventilation Lines 
• Evaporative Emission Valve 
• Fuel Tank and Fuel Sending Unit 
• Liquid / Vapor Separator