Audi A4 Brake Specifications

Common parameters

1 . Design - hydraulic, double-circuit with diagonal separation and vacuum booster. Electronic anti-skid system (stabilization stability - ESP), brake assist (BAS) and anti-lock brakes (ABS).

2 . Brake mechanisms - disk.

3 . Front calipers - FN3, C54 or FNR-G60.

4 . Rear calipers - C38 or C43.

Front brakes:

1 . The total thickness of the brake pads is 14 mm.

2 . Lining wear limit - 2-3 mm

3 . Brake disc diameter:

• FN3 - 288 mm;
• C54 - 280 mm;
• FNR-G60 - 323 mm.

4 . Ventilated brake disc thickness/wear limit:

• FN3 - 25/23 mm;
• C54 - 22/20 mm;
• FNR-G60 - 30/28 mm.

5 . Solid brake disc thickness/wear limit:

• FN3 - 15/13 mm;
• C54 - 13/11 mm.

Rear brakes

1 . Total brake pad thickness:

• C38 - 17 (16) mm;
• C43 - 17.5 mm.

2 . Pad wear limit:

• C38 - 7 mm;
• C43 - 8 mm.

3 . Brake disc diameter:

• C38 - 245 (255) mm;
• C43 - 300 mm.

4 . Brake Disc Thickness:

• C38 - 10 (12) mm;
• C43 - 20 mm.

5 . Parking brake, with rear wheel drive.

Tightening force of threaded connections, Nm

1 . Caliper front to bracket:

• Teves FN3 - 25 Nm;
• Lucas C54 - 30 Nm.

2 . Two-piston caliper - 25 Nm.

3 . Caliper FNR-G60 - 30 Nm.

4 . Rear caliper to bracket - 35 Nm.

5 . Bracket to the front wheel hub - 190 Nm.

6 . Bracket to the rear wheel hub - 75 Nm.

7 . Rear plate to rear wheel hub - 10 Nm.

8 . ABS sensors - 10 Nm.

9 . Wheel bolts - 120 Nm.

Notes:

Fastener tightening torques are also given in the text of the articles and in some illustrations.

Source:  http://carmanz.com/audi/a4-b6-2000-2004/6591-a420009-1.html#ixzz3cmAKCyjH