For 1990-2009 cars

### Removal Procedure

1. Turn the ignition switch to the OFF position.
2. Apply and release the brake pedal several times until the brake pedal becomes firm to deplete the brake booster vacuum reserve.
3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.
4. Release the quick connect (2) from the power brake booster auxiliary pump.
5. Position the vacuum brake booster hose assembly aside.
6. Disconnect the power brake booster auxiliary pump electrical connector.
7. Release the power brake booster auxiliary pump electrical connector (1) from the bracket.
8. Remove the power brake booster auxiliary pump nuts (1).
9. Remove the power brake booster auxiliary pump bolts (1) and the pump (2).
10. If necessary, remove the power brake booster auxiliary pump insulators (1) and sleeves (2).
11. If necessary, remove the power brake booster auxiliary pump bracket bolts (1) and bracket (2).

### Installation Procedure

Caution: Refer to Fastener Caution in the Preface section.

1. If removed, install the power brake booster auxiliary pump bracket bolts (1) and bracket (2) and tighten the bolts to 10 N·m (89 lb in).
2. If removed, install the power brake booster auxiliary pump insulators (1) and sleeves (2).
3. Install the power brake booster auxiliary pump bolts (1) and the pump (2) to the bracket.
4. Install the power brake booster auxiliary pump nuts (1) and tighten the nuts to 10 N·m (89 lb in).
5. Install the power brake booster auxiliary pump electrical connector (1) to the bracket.
6. Connect the power brake booster auxiliary pump electrical connector.
7. Connect the quick connect (2) to the power brake booster auxiliary pump.
8. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement.