You will need: a flat-blade screwdriver, a 13 mm socket head.
Note: To loosen the hard-to-reach vacuum booster mounting nuts, you will need a set of socket heads, extensions and ratchets similar to the one shown in the photo.
1. Disconnect the wire from the negative terminal of the battery.
2. Disconnect the hose from the vacuum booster to the inlet pipe by prying off the hose check valve with a screwdriver.
3. Remove the brake master cylinder (see "Replacing the master brake cylinder").
Note: If the operator has sufficient skills, the master brake cylinder does not need to be removed completely; it is enough to disconnect it from the brake booster and move it forward without disconnecting the pipes from it.
4. Using a screwdriver, remove the two soundproofing holders...
5. ...and remove the cover.
Source link is located on: RENAULTBOOK
6. Disconnect the brake booster pushrod from the brake pedal by unfastening the spring pin retainer from the pedal...
7. ...and, squeezing the plastic retaining ring...
8. ... remove the pin from the holes in the pedal and pusher fork.
Note: Replace the brake booster pushrod pin if it is worn or if the spring clip and snap ring are damaged.
9.7. Adjustment dimensions of the brake booster: X=22.3 mm; L=145.8 mm
9. Unscrew the four nuts securing the brake booster to the front shield...
10. ...and remove the vacuum booster.
11. Install the vacuum booster and all removed parts in the reverse order of removal. Before installation, check the adjustment dimensions of the booster (figure 9.7) and, if necessary, restore them by turning the booster rod adjusting bolt (dimension X) and the pusher fork with the lock nut (dimension L) loosened.
Note: The booster rod adjusting bolt is secured against loosening during operation with anaerobic thread lock.
12. If the master cylinder was completely removed, fill the brake fluid and bleed the air from the system (see "Bleeding the hydraulic brake system").