Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2018A5 QUATTRO PRESTIGE, 2D CONVERTIBLEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 52 (GENERAL, TECHNICAL DATA (BRAKE SYSTEM) [COUPE])00 GENERAL, TECHNICAL DATATECHNICAL DATATECHNICAL DATA, BRAKES
2018 Audi A5 Quattro Prestige, 2D Convertible
Technical Data, Brakes
2018 Audi A5 Quattro Prestige, 2D ConvertibleSECTION Technical Data, Brakes
WARNING: This page is about a different variant/trim than selected.
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 | Vacuum brake booster | |
| Brake pressure regulation | via ABS Control Module -J104- | |
Front Brakes
| PR Number | 1LA, 1LB | 1LC, 1LD, 1LG | 1LE, 1LF, 1LH | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Version | Steel | Steel | Steel | ||||||
| Brake Caliper | ContiTeves | ContiTeves | ContiTeves | ||||||
| Brake Caliper Piston | 1 | 4 | 4 | ||||||
| Brake Rotor | Diameter in mm | 314 | 318 | 338 | |||||
| New thickness | mm | 25 | 30 | 30 | |||||
| Wear limit | mm | 23. Refer to (1) and (2). | 28. Refer to (1) and (2). | 28. Refer to (1) and (2). | |||||
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Front Brakes
| PR Number | 1LJ | 1LL/1ZA/1ZC/1ZK | 1LM/1LY/1LX 1LZ/1ZX | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Version | Steel | Steel | Steel | ||||||
| Brake Caliper | Akebono | Akebono | Akebono | ||||||
| Brake Caliper Piston | 6 | 6 | 6 | ||||||
| Brake Rotor | Diameter in mm | 350 | 350 | 375 | |||||
| New thickness | mm | 34 | 34 | 36 | |||||
| Wear limit | mm | 32. Refer to (1) and (2). | 32. Refer to (1) and (2). | 34. Refer to (1) and (2). | |||||
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Front Brakes
| PR Number | 1LU/1LN/1LT | ||||||
|---|---|---|---|---|---|---|---|
| Version | Ceramic | ||||||
| Brake Caliper | Brembo | ||||||
| Brake Caliper Piston | 6 | ||||||
| Brake Rotor | Diameter in mm | 400 | |||||
| New thickness | mm | 38 | |||||
| Wear limit | mm | Determining Wear. Refer to CERAMIC BRAKE ROTOR, DETERMINING WEAR WITHOUT Carbon-Ceramic Brake Wear Tester and (1). | |||||
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Rear Brakes
| PR Number | 1KD/1KE/1KI | 1KF/1KJ/1KK/1KP 1KQ/1KR/1KU/2EJ | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Version | Steel | Steel | |||||||
| Brake Caliper | TRW | TRW | |||||||
| Brake Caliper Piston | 1 | 1 | |||||||
| Brake Rotor | Diameter in mm | 300 | 330 | ||||||
| New thickness | mm | 12 | 22 | ||||||
| Wear limit | mm | 10. Refer to (1) and (2). | 20. Refer to (1) and (2). | ||||||
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RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.