Tire chains
Tire chains cannot be used on your Impreza, WRX and STI because of the lack of clearance between the tires and vehicle body.
See also:
Low beam light bulbs
1. Pull off the fender lining. For details, refer to “Pulling off the fender
lining” F11- 7.
2. Remove the bulb cover, by turning it counterclockwise.
3. Disconnect the electrical connector.
...
To enter the passive mode
If you wish to program the passive arming mode, have it done by your SUBARU dealer. ...
Flat tires
If you have a flat tire while driving, never brake suddenly; keep driving straight ahead while gradually reducing speed.
Then slowly pull off the road to a safe place. ...