Airbag sensor location

SOURCE: 2004 pacifica impact sensors, airbags

you may not always have to replace sensors, but you will have to change the airbag module (usually under front seat, sometimes in middle of dash) To remove the passenger airbag you have to take out the dash.

SOURCE: 2008 Aura XR, Key FOB will unlock all the doors

Interesting. My best guess is that there is problem with driver's door lock actuator or switch. The remote start won't work because the car has to confirm that the doors are locked before initiating the starting sequence.

SOURCE: How do I change my low beam headlight on my 07

To change the low beam, remove the front wheel and plastic inner fender liner. This will give you access to the rear of the headlight and it's plug and play from there.

SOURCE: how do you replace low beam headlight on 2008

Access to change the headlamp bulbs is through the wheel well. The recommended method is to remove the front tire and then the plastic inner fender liner. Once removed, you'll have easy (more or less) access to the rear of the headlamp housing.

SOURCE: 2008 Saturn Aura - blower motor works

I would first check the plug to the blower and possibly the plug to the resistor, sometimes these get hot and will loose connection.