Technical Data, Brakes

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

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	Vehicles without a high-voltage system	Vacuum brake booster
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-

Front Brakes

PR Number		1LN, 1LP, 1ZT, 1LK (18" Brakes)
Brake Rotor	Diameter in mm	375
New thickness	mm	36
Wear limit	mm	34

The maximum lateral run-out for steel brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.

PR Number		1ZC, 1ZD, 1ZY, 1LF (19" Brakes)
Brake Rotor	Diameter in mm	400
New thickness	mm	38
Wear limit	mm	36

The maximum lateral run-out for steel brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.

PR Number		1ZG, 1ZR (20"-Brakes)
Brake Rotor	Diameter in mm	420
New thickness	mm	40
Wear limit	mm	38

The maximum lateral run-out for steel brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.

PR Number		1LT (20"-Ceramic Brakes)
Brake Rotor	Diameter in mm	420
New thickness	mm	40
Wear limit	mm	Refer to Determining Wear on Ceramic Brakes:

The maximum lateral run-out for ceramic brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.

PR Number		1LC, 1LI, 1ZH (21"-Ceramic Brakes)
Brake Rotor	Diameter in mm	440
New thickness	mm	40
Wear limit	mm	Refer to Determining Wear on Ceramic Brakes:

The maximum lateral run-out for ceramic brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.

Rear Brakes

PR Number		1KD, 1KQ, 1KU, 1KW, 2EA (18" Brakes)
Brake Rotor	Diameter in mm	350
New thickness	mm	28
Wear limit	mm	26

The maximum lateral run-out for ceramic brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.

PR Number		1KK, 1KV, 1KU, 1KX (19"-Brakes)
Brake Rotor	Diameter in mm	370
New thickness	mm	30
Wear limit	mm	28

The maximum lateral run-out for ceramic brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.

PR Number		1KS, 1KZ, 2EG, 2EN (19"-Ceramic Brakes)
Brake Rotor	Diameter in mm	370
New thickness	mm	30
Wear limit	mm	Determining Wear on Ceramic Brakes:

The maximum lateral run-out for ceramic brake rotors is 0.06 mm.
Measurement is performed with the brake rotor installed.
Use Dial Indicator Bracket - VAS 6079/1; Dial Indicator - 0-10mm - VAS 6079.
Clean dirt and rust off the brake rotor.
Measure 10 mm away from the outer edge of the brake rotor.