O-Ring Seals

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These rings seal off the connection points between individual components of the refrigerant circuit.

Only O-rings that are resistant to refrigerant R134a and refrigerant oil must be installed. Make sure they are original replacement parts.

O-ring seals:

-- Always use only once.

-- Make sure diameters -a and b- are correct.

Fig 1: Checking O-Ring Seal Diameters

Courtesy of AUDI OF AMERICA, LLC

-- Coat with refrigerant oil before installing. Refer to Refrigerant Circuit (vehicle-specific repair information). (vehicle-specific repair information) and the Parts Information.

NOTE:

The color coding of refrigerant circuit O-rings with R134a has been discontinued. Black and colored O-rings are used. Refer to the Parts Information and Refrigerant Circuit (vehicle-specific repair information). (vehicle-specific repair information).