See also:

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. ...

Examples of the types of accidents in which it is possible that the driver’s/driver’s and front passenger’s SRS frontal airbag(s) will deploy.
Only the driver’s SRS frontal airbag or both driver’s and front passenger’s SRS frontal airbags may be activated when the vehicle sustains a hard impact in the undercarriage area from the road surfa ...

Tire pressure monitoring system (TPMS) (if equipped)
The tire pressure monitoring system provides the driver with a warning message by sending a signal from a sensor that is installed in each wheel when tire pressure is severely low. The tire pre ...