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.
Technical Data, Brakes
2025 Audi Q3 PremiumSECTION Technical Data, Brakes
Brake system
| Components | Version | |
|---|---|---|
| Brake circuit distribution | Dual-circuit brake system with diagonal distribution: left front and right rear, right front and left 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
| PR Number | 1ZA, 1ZD, 1ZK, 1ZL | 1LA, 1LB, 1LG | 1LE, 1LF | |
|---|---|---|---|---|
| Brake Caliper | Single-Piston Brake | Single-Piston Brake | Six-Piston Brake | |
| Brake Rotor | Diameter in mm | 312 | 340 | 374 |
| New thickness | mm | 25 | 30 | 36 |
| Wear limit | mm | 22 | 27 | 34 |
| Brake pads, wear limit | Refer to Maintenance; Booklet 502; Maintenance Procedures; Brake Pad Thickness, Checking | |||
Ceramic front brakes
| PR Number | 1LJ, 1LK, 1LL | |
|---|---|---|
| Brake Caliper | Six-Piston Brake | |
| Brake Rotor | Diameter in mm | 380 |
| New thickness | mm | 38 |
| Wear limit | Refer to BRAKE ROTORS, CHECKING, CERAMIC BRAKES | |
| Brake pads, wear limit | Refer to Maintenance; Booklet 502; Maintenance Procedures; Brake Pad Thickness, Checking | |
Rear Brakes
| PR Number | 1KU, 2EM, 2EI | 1KZ, 1KD, 1KF, 1KI, 1KK, 2ER, 2ET, 2EY, 2EV | |
|---|---|---|---|
| Brake Caliper | Single-Piston Brake | Single-Piston Brake | |
| Brake Rotor | Diameter in mm | 300 | 310 |
| New thickness | mm | 12 | 22 |
| Wear limit | mm | 10 | 20 |
| Brake pads, wear limit | Refer to Maintenance; Booklet 502; Maintenance Procedures; Brake Pad Thickness, Checking | ||
RENDER: 1.0x
NO RELATED
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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.