See also:

Two separate circuits
Your vehicle has two separate circuit brake systems. Each circuit works diagonally across the vehicle. If one circuit of the brake system should fail, the other half of the system still works. ...

Effect vehicle modifications made for persons with disabilities may have on SUBARU advanced frontal airbag system operation (U.S. only)
Changing or moving any parts of the front seats, seat belts, front bumper, front side frame, instrument panel, combination meter, steering wheel, steering column, tire, suspension or floor panel c ...

Automatic/Emergency Locking Retractor (A/ELR)
Each passenger’s seatbelt has an Automatic/ Emergency Locking Retractor (A/ ELR). The Automatic/Emergency Locking Retractor normally functions as an Emergency Locking Retractor (ELR). The A/ ...