Overview - Front Brakes, Single-Piston Brake

Fig 1: Exploded View Of Front Brakes, Single-Piston Brake

Courtesy of AUDI OF AMERICA, LLC

1. Brake Shield
   • Refer to BRAKE SHIELD, REMOVING AND INSTALLING 
2. Wheel Bearing Housing
3. Bracket
   • For brake hose and wire
4. Bolt
   • 20 Nm
5. Hose Bracket
   • for brake hose
6. Brake Hose
   • Replace if damaged
   • Make sure that tabs are properly seated in the grooves on the bracket.
   • Make sure the brake hose is routed correctly. Make sure the brake hose is not blocked, bent, twisted or rubbing against the vehicle.
   • Brake hose to brake caliper tightening specification: 14 Nm
7. Hose Bracket
   • for brake hose
8. Bracket
   • For the brake line/hose
   • On the body
9. Spring
   • Replace if damaged
10. Brake Line
    • Do not change the bending shape.
    • Replace a damaged or bent brake line
    • Brake line to brake hose tightening specification: 14 Nm
11. Bolt
    • 200 Nm
12. Brake Pads
    • Allocation. Refer to the Parts Information.
    • Left inner brake pad with the Left Front Brake Pad Wear Sensor -G34-
    • If the brake pad wear indicator wire is damaged, replace the brake pads
    • Check the pad thickness. For the wear limit, refer to Maintenance Procedures; Brake Pads, Checking Thickness.
    • Always replace on both sides of the axle.
    • Refer to BRAKE PADS, REMOVING AND INSTALLING, SINGLE-PISTON BRAKE 
    • Refer to Fig 2
13. Cap
14. Bearing Bushing
    • Refer to BEARING BUSHING AND GUIDE PIN, REPLACING
15. Guide Pin
    • Refer to BEARING BUSHING AND GUIDE PIN, REPLACING
    • 30 Nm
16. Bolt
    • 9 Nm
17. Bracket
    • For brake hose and wire
18. Protective Cap
19. Bleed Screw
    • Refer to HYDRAULIC SYSTEM, BLEEDING
    • 18 Nm
20. Brake Caliper Housing
    • Allocation. Refer to the Parts Information.
    • To replace brake pads, unfasten from brake carrier
    • Refer to BRAKE CALIPER, REMOVING AND INSTALLING, SINGLE-PISTON BRAKE 
    • Refer to BRAKE CALIPER, REPLACING, SINGLE-PISTON BRAKE 
    • Servicing. Refer to BRAKE CALIPER PISTON, REMOVING AND INSTALLING, SINGLE-PISTON BRAKE .
21. Spring
    • Insert in both holes on the brake caliper housing
      • The spring must be pressed under brake carrier after it is inserted in both holes. If improperly installed, the wear of the outer brake pad cannot be adjusted, thereby increasing brake pedal travel.
22. Brake Carrier
    • Refer to BRAKE CARRIER, REMOVING AND INSTALLING 
    • Remove and install together with the brake caliper. Refer to BRAKE CALIPER, REMOVING AND INSTALLING, SINGLE-PISTON BRAKE .
23. Brake Rotor
    • Allocation. Refer to the Parts Information.
    • Wear limit specified on the brake rotor
    • Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES
    • Always replace on both sides of the axle.
    • When replacing the brake rotors, also replace the brake pads.
    • Refer to BRAKE ROTOR, REMOVING AND INSTALLING, STEEL BRAKES 
24. Bolt
    • 8 Nm
25. Bolt
    • 10 Nm

Installation position of the single-piston brake brake pads

Fig 2: Brake Pad Installation Position, Steel Brakes 1LA/1LB

Courtesy of AUDI OF AMERICA, LLC

1. Clip the inner brake pad with the spring -arrow- into the brake caliper piston
2. Engage the outer brake pad into the brake carrier