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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Mechanical Components (Brake System) (1 Of 2) >> 46 Mechanical Components >> Front Brakes >> Overview - Front Brakes >> Overview - Front Brakes, Steel Brakes 1LA/1LB

Overview - Front Brakes, Steel Brakes 1LA/1LB

Fig 1: Exploded View Of Front Brakes, Steel Brakes 1LA/1LB
GWWA46-10637Courtesy of AUDI OF AMERICA, LLC
  1. Brake Shield
  2. Wheel Bearing Housing
  3. Bracket
    • For brake hose and wire
  4. Bolt
    • 20 Nm
    • Replace if damaged
    • Replace self-locking bolts and nuts after removing
    • Clean before re-using
  5. Hose Bracket
    • For brake hose
  6. Brake Hose
    • Brake hose to brake caliper tightening specification: 14 Nm
    • Replace if damaged
    • Make sure the brake hose is routed correctly. Make sure the brake hose is not blocked, bent, twisted or rubbing against the vehicle.
    • Make sure that tabs are properly seated in the grooves on the bracket.
  7. Hose Bracket
    • For brake hose
  8. Bracket
    • For the brake line/hose
    • On the body
  9. Spring
    • Replace if damaged
  10. Brake Line
    • Brake line to brake hose tightening specification: 14 Nm
    • Replace a damaged or bent brake line
    • Do not change the bending shape.
  11. Bolt
    • 200 Nm
    • Replace if damaged
    • Clean before re-using
    • Replace self-locking bolts and nuts after removing
  12. Brake Pads
  13. Cap
  14. Bearing Bushing
  15. Guide Pin
  16. Bolt
    • 9 Nm
    • Replace if damaged
    • Replace self-locking bolts and nuts after removing
    • Clean before re-using
  17. Bracket
    • For brake hose and wire
  18. Protective Cap
  19. Bleed Screw
  20. Brake Caliper Housing
  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
  23. Brake Rotor
    • Allocation. Refer to the Parts Information.
    • Wear limit. Refer to TECHNICAL DATA, BRAKES .
    • Maximum lateral run-out: 0.06 mm
    • If the brake rotor is installed, measure using the Dial Indicator - 0-10mm :VAS6079  and Dial Indicator Bracket :6079/1  .
    • Clean away any dirt and rust on the brake rotor, and perform the measurement 10 mm from the outer edge of the brake rotor.
    • Do not use excessive force to separate the brake rotor from the wheel hub. Use rust remover, if necessary, otherwise the brake rotor could be damaged.
    • Refer to BRAKE ROTOR, REMOVING AND INSTALLING, STEEL BRAKES 
      CAUTION:

      Risk of accident due to uneven braking.

      - If a brake rotor is damaged or worn, check the other brake rotors for damage and wear.

  24. Bolt
    • 8 Nm
    • Replace if damaged
    • Replace self-locking bolts and nuts after removing
    • Clean before re-using
  25. Bolt
    • 10 Nm
    • Replace if damaged
    • Replace self-locking bolts and nuts after removing
    • Clean before re-using

Brake Pad Installation Position, Steel Brakes 1LA/1LB

Fig 2: Brake Pad Installation Position, Steel Brakes 1LA/1LB
GWWA46-10651Courtesy 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