Audi Q3: Air Quality Sensor -G238-, Removing and Installing
Removing
- Remove the plenum chamber cover. Refer to
→ Body Exterior; Rep. Gr.50; Bulkhead; Plenum Chamber Cover,
Removing and Installing.
- Release the securing tab -4-
and turn the housing -1- for the
Air Quality Sensor -G238- counter-clockwise
-arrow-.
- Remove the housing from the rain water drain channel
-2- for the fresh air intake.
- Disconnect the connector -3-.
Note
Do not store a removed Air Quality Sensor -G238- in areas
where it can come into contact with solvents, fuels, and certain
chemical compositions (fluids or vapors).

Installing
Installation is done is reverse order, observe the
following:
Note
- So that no water enters into the A/C unit (heater) via the
rain water drain channel -1- when
the plenum chamber cover -2- is
installed, the plenum chamber cover must not be damaged.
- If the plenum chamber cover is damaged or is installed
incorrectly, water can flow into the fresh air intake duct via
the rain water drain channel.
- The plenum chamber cover must be completely engaged in the
windshield frame -3-. Refer to
→ Body Exterior; Rep. Gr.50; Bulkhead; Plenum Chamber Cover,
Removing and Installing.
- Install the plenum chamber cover. Refer to
→ Body Exterior; Rep. Gr.50; Bulkhead; Plenum Chamber Cover,
Removing and Installing.

READ NEXT:
Note
Complaints may arise regarding the Air Conditioning (A/C)
system regulation if there is a faulty measured value for the
Outside Air Temperature Sensor -G17-. Refer to Vehicle
Diag
Humidity Sensor -G355-, Removing and Installing, Vehicles without
Driver Assistance Systems Front Camera
Note
Only on vehicles with an automatic climate control system
There are diff
SEE MORE:
Switching on and off
Applies to: vehicles with steering wheel heating
Press the button on the
multifunction steering
wheel to switch the steering wheel heating
on and off.
Messages
Applies to: vehicles with steering wheel heating
The following messages may appear depending
on the vehicle equ
Lower Transverse Link, Removing and Installing, FWD Vehicles
Special tools and workshop equipment
required
Torque Wrench 1332 40-200Nm -VAG1332-
Removing
- Measure dimension from center of wheel to lower edge of
wheel housing. Refer to
→ Chapter "Wheel Bearing in Curb Weig