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Brake hoses and brake lines > < Removing and installing non-return valve

A4 Mk3

Checking non-return valve
Checking non-return valve
The valve should allow air to pass in the direction indicated by the arrow.
Valve must remain closed in opposite direction.
Observe correct installation position.
The arrow points towards the vacuum pump.
   

Brake hoses and brake lines > < Removing and installing non-return valve