Fresh Air Intake

Fresh Air Intake

• Depending on the version, for some countries with high dust levels, a filter - C - is installed in the filter mount - B - instead of the fresh air intake grille - A -. The dust filter - C - prevents pollen and sand from getting sucked into the fresh air blower (V2). Refer to Electronic Parts Catalog (ETKA).






• Make sure when removing the dust filter - C - that contaminates do not fall into the A/C intake shroud.

• The dust filter - C - is held in the filter mount - B - with the retaining strap - D -.

• Note the replacement interval for the dust filter - C -.

• Clean the air intake shroud and the area around the dust filter - C - in the plenum chamber before installing a new filter.

• Pay attention to the air flow direction - arrows - when installing the dust filter - C -.

Preparatory work

- Turn off the ignition.


For vehicles without a high voltage system

- Remove the plenum chamber cover and/or the cowl panel (there are different versions).

• The following illustrations show the location of the components on an Audi A5 Coupe; an Audi A5 Sportback, Audi A4, Audi Q5 etc., the location of the components varies slightly. The description of the components is not different; removing, installing and checking is performed in the same way as on the Audi A5 Coupe.






• The fresh air intake shaft - A - may have an additional cover with a rain water drain channel - B - depending on the vehicle version and the plenum chamber cover installed. Refer to the Parts Catalog.






- Remove both windshield wiper arms (only on vehicles where the cowl and the fresh air intake cover on the cowl - A - are one piece).






- Pull the left rubber seal - B - as far as necessary

- Remove the fresh air intake cover on the wind cowl - A - or the wind cowl (different styles).

• Loosen the cowl panel trim from the windshield crossmember - C -.

All vehicles

Checking

- Check the cowl - A - for proper installation and damage.

- Check the seals between the fresh air intake cover- A -, the cowl and the windshield cross member - C - for damage and proper fit. This seals prevent water from entering between window cross member and cover and running into A/C unit air intake shroud.

Removing and Installing

• Depending on the version, for some countries with high dust levels (for example China), a dust filter installed instead of intake air grille - A -, which prevents dust and sand from entering the fresh air blower. Refer to Electronic Parts Catalog (ETKA).






- Perform the preparatory work.

- Disconnect the connector - B - from the air quality sensor (G238) / humidity sensor in fresh air intake duct (G657) (there are different locations).






• There are different versions of the air intake shroud for the fresh air intake - C - (with and without a mount for the for the air quality sensor / humidity sensor in fresh air intake duct - A -, in the front or on the side). Refer to the Parts Catalog.

- Remove the screws - C - (tightening specification: 3 Nm) and cover with the water channel - B -.






- Remove the screws - B -.






- Remove the fresh air intake - C -.

Installation is done is reverse order, observe the following:

• Pay attention to the tightening sequence for the nuts - B - when installing them.

- Tighten the nuts - B - lightly by hand in the following sequence.

• Tighten the inner lying nut - B - (in the right illustration).

• Tighten the outer lying nut - B - (top left in the illustration).

• Tighten the outer lying nut - B - (bottom left in the illustration).

- Tighten the nuts - B - which correspond to the tightening sequence at the top (tightening specification: 3.5 Nm).

• Check for damage prior to installing the fresh air intake - C - and the bonded seal; if there is damage, replace the seal or fresh air intake - C -. Refer to the Parts Catalog.

• When installing, make sure the fresh air intake - C - and seal are seated correctly; if the fresh air intake - C - is not installed correctly, water can seep into the A/C unit intake shroud through the sealing surface - D -.

• Prior to installing the cowl cover - A - (there are different versions), check the cowl and the seals for the cover - A - and the window cross member - C - for damage; if the cover, the cowl or the seal are damaged, water can seep into the fresh air intake and also into the A/C intake shroud.