Check Valve, Removing And Installing, Except RS 5: Removing

-- Open the hose clamp on the vacuum hose using suitable pliers.

-- Disconnect the vacuum hose from the pump.

-- Remove the vacuum hose on the left and right of the check valve -4-.

Fig 1: Identifying Vacuum Pump Assembly Overview

Courtesy of AUDI OF AMERICA, LLC

-- Remove the check valve from the vehicle.