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:
Fig. 152 Engine compartment with battery: connections
for charger and jump start cable
Observe the safety precautions.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery cables
remain connected.
The battery is located in the engine compartment.
The ground po
Overview - Electronic Damping Component Location
Note
The body acceleration sensors may not be interchanged with
each other.
1 - Right Front Body Acceleration Sensor -G342-
Removing and installing. Refer to
→ Chapter "Left/Right Front Body Acceleration Sensor -