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Disc Brakes: Specifications Audi A8 D2 facelift

TORQUE SPECIFICATIONS

ApplicationFt. Lbs. (N.m)
Brake Hose Hollow Bolt-To-Caliper15 (20)
Brake Line-To-Caliper15 (20)
Brake Pad-To-Caliper Housing Torx Bolt
Front (HP2, Steel Caliper) (1)18 (25)
Caliper-To-Carrier Bolts (Guide Bolt) (1)
FN318 (25)
Rear (1)26 (35)
Caliper-To-Bearing Housing Bolts
HP2 (Steel Caliper)148 (200)
HP2 (Aluminum Caliper)140 (190)
Brembo (1)81 (110)
Carrier-To-Bearing Housing Bolts
FN389 (120)
Rear (Steel Carrier)44 (60)
Rear (Aluminum Carrier)(2)
Master Cylinder-To-Booster (Torx Head Bolt)18 (25)
Master Cylinder-To-Booster Nut37 (50)
Wheel Bolt90 (120)
INCH Lbs. (N.m)
Master Cylinder Reservoir Trunnion Bolt89 (10)
(1) Always replace with NEW bolts. (2) Tighten to 52 ft. lbs. (70 N.m) and then an additional 90 degrees.
(1)Always replace with NEW bolts.
(2)Tighten to 52 ft. lbs. (70 N.m) and then an additional 90 degrees.

TORQUE SPECIFICATIONS

DISC BRAKE SPECIFICATIONS

ApplicationIn. (mm)
Front Axle
FN3 (Single Piston)
Caliper Piston Diameter2.24 (57)
Brake Pad Thickness (New)(2) 0.750 (19)
Pad Minimum Thickness(2) 0.28 (7)
Disc Diameter (15" Wheels)11.34 (288)
Disc Diameter (16" Wheels)12.28 (312)
Lateral Runout(1)
Original Thickness.984 (25)
Minimum Thickness.910 (23)
HP2 (Double Piston Design )
Caliper Piston Diameter1.69 (42.8)
Brake Pad Thickness (New)(2) 0.669 (17)
Pad Minimum Thickness(2) 0.28 (7)
Disc Diameter
15" Wheels12.36 (314)
16" Wheels12.72 (323)
Lateral Runout(1)
Original Thickness1.18 (30)
Minimum Thickness1.10 (28)
Brembo (4 Piston Design)
Caliper Piston Diameter1.57 Or 1.81 (40 Or 46)
Brake Pad Thickness (New)(2) .669 (17)
Pad Minimum Thickness(2) 0.28 (7)
Disc Diameter (17" Wheels)13.58 (345)
Lateral Runout(1)
Original Thickness1.18 (30)
Minimum Thickness1.10 (28)
Rear Axle
Non-Ventilated Disc (15" Wheel)
Caliper Piston Diameter1.5 Or 1.41 (38.1 Or 36)
Brake Pad Thickness (New)(2) .470 (17)
Brake Pad Wear Limit(2) 0.28 (7)
Disc Diameter9.65 (245)
Lateral Runout(1)
Original Thickness.394 (10)
Minimum Thickness.315 (8)
Ventilated Disc (16" Wheel)
Caliper Piston Diameter1.69 Or 1.61 (42.8 Or 40.8)
Brake Pad Thickness (New)(2) .470 (17)
Brake Pad Wear Limit(2) 0.28 (7)
Disc Diameter10.59 (269)
Lateral Runout(1)
Original Thickness.787 (20)
Minimum Thickness.709 (18)
Ventilated Disc (17" Wheel)
Caliper Piston Diameter1.69 Or 1.61 (42.8 Or 40.8)
Brake Pad Thickness (New)(2) .470 (17)
Brake Pad Wear Limit(2) 0.28 (7)
Disc Diameter11.02 (280)
Lateral Runout(1)
Original Thickness.866 (22)
Minimum Thickness.787 (20)
(1) Specification not available from manufacturer. (2) Specification includes backing plate. (3) Aluminum caliper, fitted with 2 pistons.
(1)Specification not available from manufacturer.
(2)Specification includes backing plate.
(3)Aluminum caliper, fitted with 2 pistons.

DISC BRAKE SPECIFICATIONS