Subaru 2003 Legacy - Manual (Page 92)

2-2
Keys
HS0009
Master key
Submaster key
Valet key
Key number plate
Three types of keys are provided for your vehicle.
Master key, submaster key and valet key.
The master key and submaster key fit all locks on your vehicle.
D Ignition switch
D Doors
D Trunk (sedan) or Rear gate (station wagon)
D Glove box
The valet key fits only the ignition switch and door locks. You can keep
the trunk and glove box locked when you leave your vehicle and valet
key at a parking facility.
B
Key number
The key number is stamped on the metal plate attached to the key
set. Write down the key number and keep it in another safe place, not
in the vehicle. This number is needed to make a replacement key if
you lose your key or lock it inside the vehicle.