Follow the BOV's hose to the BOV solenoid.

Use the pliers to loosen the clamps and disconnect the hose from the solenoid gently.

It is normal to hear a hiss. This is just excess air being released.

Carefully disconnect the old BOV and inspect the hoses and flange for any debris or damage.

Use the pliers to looser the clamps on the BOV and disconnect the hose gently.