CAUTION:
Handling the air bag module improperly can accidentally deploy the air bag module, which may seriously injure you. Read the air bag system service warnings and cautions before handling the air bag module..
1. Switch the ignition to off.
2. Disconnect the negative battery cable and wait for 1 min or more.
.
3. Remove the following parts:
a. Driver-side air bag module.
b. Steering wheel.
c. Column cover.
d. Clock spring.
e. Combination switch.
4. Remove the screws shown in the figures, then pull the light switch, and the wiper and washer switch in the direction of the arrow respectively to remove them.

5. Assemble in the reverse order of disassembly.
Back Up Light Switch Removal/Installation [G66 M R]
Combination Switch Removal/InstallationElectrical System
Electrical Parts
Battery cable
Before disconnecting connectors or removing electrical parts, disconnect
the negative battery cable.
Wiring Harness
To remove the wiring harness from the clip in the engine room, pry up the
hook of the clip using a flathead screwdriver. ...
Warning lights and indicators
The Subaru Solterra is equipped with a comprehensive set of warning
lights and indicators located on the instrument cluster and exterior mirrors, designed
to clearly communicate the current condition and operational status of various vehicle
systems to the driver in real time.
Warning lights ...
Mass Air Flow (MAF) Sensor/Intake Air Temperature (Iat) Sensor No.1 Removal/Installation
[Skyactiv G 2.0]
CAUTION:
Be careful not to hit the sensor element or allow foreign matter to get on
it during sensor removal/installation. If the sensor element is hit or foreign
matter gets on it, an error may occur in the sensor output signal resulting
in deterioration in the engine control.
...