Audi Workshop Service and Repair Manuals

Removing air cleaner (bottom section) Removing –  Remove cover above radiator grille (4 bolts). –  Completely remove air duct -1-.

–  Unplug electrical connector -2- at air mass meter -G70-.

–  Release hose clip -3- and detach air hose from air mass meter -G70-. –  Remove bolts -arrows- from air cleaner (top section) and lift out air cleaner (top section).

–  Disconnect vacuum hose -1- at air filter bypass flap valve -N275--2-. –  Release retainer for bottom section of air cleaner (press in rubber on left and right side and pull upwards). –  Unplug electrical connector at air filter bypass flap valve -N275-. –  Carefully take out air cleaner (bottom section). Installing To ensure the proper function of the air mass meter -G70- it is important to observe the following instructions.   Note t  If the air filter element is very dirty or wet, dirt or water could reach the air mass meter -G70- and affect the air mass value. This would lead to loss of power, since a smaller injection quantity is calculated. t  Always use genuine part for air filter element. t  Use a silicone-free lubricant when installing the intake hose. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Parts catalogue t  Do not use lubricant when installing retainer.

–  If warm air intake hose is fitted (for countries with cold climates only), make sure that air intake connection has engaged properly -arrows- (pay attention to markings).

–  Check water drain hose -arrow- in air cleaner (bottom section) for dirt and other obstructions (clean if necessary). –  Clean salt residue, dirt and leaves out of air cleaner housing (top and bottom sections); use a vacuum cleaner if necessary. –  Check for salt residue, dirt and leaves in air mass meter and air intake hose (engine intake side). –  Check for dirt in air duct leading to air filter element. –  Plug in electrical connector at air filter bypass flap valve -N275- again. –  Re-install air cleaner (bottom section).   Note The water drain hose must be routed straight downwards and must not be kinked.

–  Slide vacuum hose -1- back onto connection of air filter bypass flap valve -N275-.

–  Lug on air filter element -1- must make contact with lug on air cleaner housing -2-. –  Fit the top section of the air cleaner carefully on the bottom section, without using force.   Note Before tightening bolts, make sure that top section of air cleaner is inserted into groove on bottom section of air cleaner (to prevent air leaks). –  Then screw top section of air cleaner back onto bottom section. –  Ensure secure fit of air hose at air mass meter -G70-. –  Re-connect electrical connector at air mass meter -G70-. –  The remaining installation steps are carried out in the reverse sequence.