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Home >> Audi >> 2017 >> S3 Premium Plus >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Components (Brakes) -- (Sedan) >> 47 Hydraulic Components >> Vacuum System >> Check Valve, Removing And Installing >> Removing

Check Valve, Removing And Installing: Removing

Vehicles with 1.2L/1.4L TFSI Engine 

Fig 1: Identifying Cover And Retainers
GWWA10-11565Courtesy of AUDI OF AMERICA, LLC

-- Release the retainer -arrow- and remove the vacuum hose -1-.

-- Free up the vacuum hose on the air duct pipe -2-.

Vehicles With 1.8L/2.0L TFSI Engine 

Fig 2: Identifying Clamps With Air Guide Pipe
GWWA21-10818Courtesy of AUDI OF AMERICA, LLC

-- Remove the engine cover. Refer to ENGINE COVER [CNSB, CNTC] / ENGINE COVER, REMOVING AND INSTALLING [CRUA, DEJA] .

-- Loosen the hose clamps -1 and 2- and remove the air duct pipe.

-- Disconnect the vacuum hose -2-.

GWWA10-11630Courtesy of AUDI OF AMERICA, LLC

-- Press the release button on the vacuum hose -1- and remove the hose from the vacuum pump.

Vehicles With 1.6L/2.0L TDI Engine 

GWWA21-10785Courtesy of AUDI OF AMERICA, LLC

-- Remove the engine cover. Refer to ENGINE COVER [CNSB, CNTC] / ENGINE COVER, REMOVING AND INSTALLING [CRUA, DEJA] .

-- Free up the vacuum hoses -arrows-.

-- Loosen the hose clamps -1 and 2- and remove the air duct pipe.

-- Release the retainer -arrow- and remove the vacuum hose -1-.

Fig 3: Identifying Retainer
GWWA10-11619Courtesy of AUDI OF AMERICA, LLC
NOTE:

Different equipment depending on the version.

Ignore -items 2 and 3-.

Vehicles With 2.5L TFSI Engine 

Fig 4: Disconnecting Vacuum Hose
GWWA19-10957Courtesy of AUDI OF AMERICA, LLC

-- Remove the air filter housing. Refer to AIR FILTER HOUSING, REMOVING AND INSTALLING [CNSB, CNTC] .

-- Remove the vacuum hose -2-.

-- Free Up The Vacuum Hose -1-, Pull It Out Of The Brake Booster Vacuum Pump And Remove It.

Continuation For All Engines: 

GWWA47-10245Courtesy of AUDI OF AMERICA, LLC

-- If installed, disconnect the connector -1- from the Vacuum Sensor -G608-.

-- Carefully remove the vacuum hose -2- from the brake booster.

NOTE:

Do not damage the vacuum hose. A damaged vacuum hose must be replaced.