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.
Brake System Identification
A6, Allroad, RS6 and S6 models are equipped with one of several brake systems. Brake caliper application is designated by the Production Code (Pr. No.). Pr. No. is printed on vehicle data sticker located in spare tire well or in owners customer's service schedule. See Fig 1. For brake caliper Pr. Nos., see PRODUCTION CODES table. To identify brake system and components, see Fig 2-Fig 7 .
| Brake System | Production Number | ||
|---|---|---|---|
| Front | |||
| FN3 | |||
| With 15" Wheels | 1LB/1LE | ||
| With 16" Wheels | 1LT/1LF | ||
| FNR-G60 | 1LA/1LG | ||
| HP 2 | 1LX/T7Z | ||
| Brembo | 1LJ | ||
| Rear | |||
| C38 | 1KD | ||
| C43 | 1KE/1KZ | ||
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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.