Brake system — specifications (Audi A4 B7)

General information

Brake system - Double diagonal split circuit, with disc brakes on all wheels

Brake fluid type - see Specifications to Chapter 1

ABS control unit model - Bosch 5.7 or Bosch 8.0

GTZ diameter, mm - 25.4 or 26.99

Front brake parameters

Caliper model	C54	FN3	FN3	FNR-G 60		Brembo
Size, inch	15	15	16	16	17	18
PR code on the vehicle data plate	1LZ	1LB/1LE	1LT/1LF	1LA/1LD	1LJ	1LP
Wheel cylinder piston diameter, mm	54	57	57	60	60	28/32
Brake disc diameter, mm	280	288	312	320	345	365
Thickness of ventilated disc, mm	22	25	25	30	30	34
Minimum allowable disk thickness, mm	20	23	23	28	28	32
Thickness of the pad (including backing), mm	19.3	20.3	20.3	20.3	20.3	20.3

Rear brake parameters

Caliper model	C38		C41	C43
Size, inch	15	16	16	16	18
PR code on the vehicle data plate	1KD	1KP	1KW	1KE	1KY
Wheel cylinder piston diameter, mm	38		41	43
Brake disc diameter, mm	245	255	288	300	335
Disc thickness, mm	10	12	12	22
Minimum allowable disk thickness, mm	8	10	10	20
Thickness of the pad (including backing), mm	16			17.5	-
Minimum permissible thickness of the pad (including backing), mm	7			8	-

Tightening force of threaded connections, Nm

Anchor bracket to front wheel bearing holder - 30

Front support to anchor bracket - 190

Bleed nipple for FNR-G60 caliper // other calipers (except Brembo) — 15 // 10

Bosch 8.0 hydraulic modulator with bracket to longitudinal beam - 10

ABS Wheel Sensors - 10

Brake shields - 10

Brake hose to rear caliper - 38

Rear caliper to anchor bracket - 35

Anchor bracket to the hub bearing holder - 75