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Technical Data, Brakes

Brake System

Components Version
Brake circuit distribution Dual-circuit brake system with allocation in pairs: left and right front, left and right rear.
Brake Master Cylinder Tandem brake master cylinder
Brake booster Vehicle without a high-voltage system Vacuum brake booster
Vehicles with a high-voltage system Electric Brake Booster -NX6- with Brake System Pressure Reservoir -VX70-
Brake pressure regulator Via ABS Control Module -J104-

Steel Front Brakes

Vehicle   Q7 Q7, Q8 Q7
PR Number   1ZA, 1ZK, 1LX, 1LZ 1LN, 1LP, 1LK, 1ZT 1LV, 1LW, 1LB, 1ZY
Brake Caliper        
  Brake Caliper Piston   6 6 6
Brake Rotor diameter in mm 350 375 400
  New thickness mm 34 36 38
  Wear limit mm 32. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES . 34. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES . 36. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES .
Brake Pads        
  Wear limit   Refer to Maintenance Procedures; Brake Pad Thickness, Checking.
(1) (1) - The wear limit is specified on the brake rotor.
Vehicle   Q7, Q8 RSQ8  
PR Number   1ZC, 1ZD, 1LF, 1ZY 1ZG, 1ZR  
Brake Caliper        
  Brake Caliper Piston   6 10  
Brake Rotor diameter in mm 400 420  
  New thickness mm 38 40  
  Wear limit mm 36. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES . 38. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES .  
Brake Pads        
  Wear limit   Refer to Maintenance Procedures; Brake Pad Thickness, Checking.
(1) The wear limit is specified on the brake rotor

Ceramic Front Brakes

Vehicle   Q7, Q8 RSQ8  
PR Number   1LT 1LC, 1LI, 1ZH  
Brake Caliper        
  Brake Caliper Piston   10 10  
Brake Rotor diameter in mm 420 420  
  New thickness mm 40 40  
  Wear limit mm FOOTNOTE  Refer to BRAKE ROTORS, CHECKING, CERAMIC BRAKES  FOOTNOTE  Refer to BRAKE ROTORS, CHECKING, CERAMIC BRAKES   
Brake Pads        
  Wear limit   Refer to Maintenance Procedures; Brake Pad Thickness, Checking.
(1) The wear limit is specified on the brake rotor

Rear Steel Brakes

Vehicle   Q7 Q7, Q8 RSQ8
PR Number   2ED, 2EE, 2EH, 2EJ 1KD, 1KQ, 1KU, 1KW, 2EA 1KU, 1KV, 1KX
Brake Caliper        
  Brake Caliper Piston   1 1 1
Brake Rotor diameter in mm 330 350 370
  New thickness mm 22 28 30
  Wear limit mm 20. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES . 26. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES . 28. Refer to FOOTNOTE  and Refer to BRAKE ROTOR, CHECKING, STEEL BRAKES .
Brake Pads        
  Wear limit   Refer to Maintenance Procedures; Brake Pad Thickness, Checking.
(1) The wear limit is specified on the brake rotor

Ceramic Rear Brakes

Vehicle   Q7, Q8 RSQ8  
PR Number   1KZ 1KS, 2EG, 2EN  
Brake Caliper        
  Brake Caliper Piston   1 10  
Brake Rotor diameter in mm 370 370  
  New thickness mm 30 30  
  Wear limit mm FOOTNOTE  Refer to BRAKE ROTORS, CHECKING, CERAMIC BRAKES  FOOTNOTE  Refer to BRAKE ROTORS, CHECKING, CERAMIC BRAKES   
Brake Pads        
  Wear limit   Refer to Maintenance Procedures; Brake Pad Thickness, Checking.
(1) The wear limit is specified on the brake rotor.
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