See also:

ABS system self-check
You may feel a slight shock in the brake pedal and hear the operating sound of ABS from the engine compartment just after the vehicle is started. This is caused by an automatic functional test of ...

Safety
Still think you can't have it all? Check out the Impreza's crash tests, which at the time of publication are the best in the Insurance Institute for Highway Safety's Small Car class, with top scor ...

Lubrication oil circulation in the refrigerant circuit
Operate the air conditioner compressor at a low engine speed (at idle or low driving speeds) a few minutes each month during the off-season to circulate its oil. ...