Ignition Key Lock: Replacement

Disconnect the ground cable from battery.
Remove the steering column. Ref. to REMOVAL , Tilt Steering Column.
Secure the steering column in a vise. Remove the bolt with a drill.

Fig 1: Identifying Bolt With Drill
Courtesy of SUBARU OF AMERICA, INC.
Remove the ignition key lock.
Use new bolts. Tighten the bolt until the bolt head is broken (bolt head wrenched off).

Fig 2: Identifying Ignition Key Lock
Courtesy of SUBARU OF AMERICA, INC.