Selecting the correct aftermarket brake pads for the Audi RS5 (B9 chassis) requires careful attention to the specific braking package installed on the vehicle. The B9 RS5 was offered with massive steel rotors as standard, while an optional Carbon Ceramic Brake (CCB) package provided reduced unsprung weight and enhanced heat resistance for track environments. Because the friction material requirements differ significantly between these two systems, owners must identify their rotor type before purchasing replacement pads to ensure safety and optimal performance.
Contents
- Key Context
- Structured Analysis
- Practical Checklist
- FAQ
- Source Notes
- Professional Disclaimer
Key Context
The Audi RS5 (B9 platform, produced roughly 2017–2023) utilizes a high-performance braking architecture that varies by option code. The standard configuration features large, drilled steel rotors paired with multi-piston calipers designed for aggressive street and light track use. The optional upgrade, often identified by the "Dynamic Package" or explicitly as the Carbon Ceramic option, utilizes silicon carbide rotors that demand specific, non-metallic friction materials.
Confusion often arises because the B9 RS5 shares its 2.9T engine and chassis layout with the S5 and A5, but the RS5 brake calipers and pad shapes are unique to the high-performance model. Furthermore, community discussions highlight that certain aftermarket combinations, particularly slotted rotors paired with specific compound pads like Hawk, can generate undesirable humming noises. Understanding the distinction between daily driving needs and track-day requirements is essential when selecting a replacement compound.
Structured Analysis
1. Identifying the Brake System Configuration
Before selecting a pad, the owner must confirm whether the vehicle is equipped with standard steel rotors or the optional Carbon Ceramic Brakes (CCB). The CCB system is visually distinct, often featuring gold-colored calipers with "Carbon Ceramic" lettering, whereas the steel system typically uses black or red calipers without this specific designation. Using steel-brake pads on carbon ceramic rotors will cause catastrophic damage to the rotors, while carbon-specific pads may not generate enough friction or heat capacity if used incorrectly on steel systems designed for different thermal profiles.
2. Performance Pads for Steel Rotor Equipped Models
For the majority of B9 RS5 owners with the standard steel rotor setup, upgrading from OEM pads to high-performance aftermarket options is common for track days or spirited driving. Evidence from enthusiast communities suggests that the RS5 brakes are engineered to handle higher friction coefficients, similar to those found in Pagid Racing HP306 pads. These materials are suitable for high-temperature environments where OEM pads might fade. However, owners should be aware that high-friction racing compounds can increase rotor wear and produce more dust than street-oriented alternatives.
3. Noise and Rotor Compatibility Considerations
A specific concern noted in Audi owner forums involves brake noise resulting from specific pad and rotor combinations. There are reports that pairing certain aftermarket pads, such as those from Hawk, with slotted rotor designs can create a persistent humming noise. For owners sensitive to NVH (Noise, Vibration, and Harshness), drilled rotors or specific street-performance compounds may offer a quieter alternative while still providing improved stopping power over stock. It is critical to match the pad compound to the rotor surface type (drilled vs. slotted) to mitigate acoustic issues.
4. Maintenance and Bedding Procedures
Regardless of the brand chosen, the installation workflow for the B9 RS5 requires strict adherence to bedding-in procedures. High-performance aftermarket pads often contain different metallic or ceramic content than OEM parts, requiring a specific heat cycle to transfer a layer of friction material onto the rotor surface. Failure to properly bed new pads can lead to uneven wear, judder, or reduced braking efficiency. Additionally, because the RS5 utilizes complex electronic parking brake integration within the rear calipers, proper diagnostic tools are required to retract the pistons during service.
Practical Checklist
- Verify Rotor Type: Confirm visually or via VIN decode if the vehicle has standard steel rotors or optional Carbon Ceramic Brakes (CCB).
- Check Option Codes: Look for specific option codes related to the "Dynamic Package" or carbon ceramics to ensure part compatibility.
- Match Pad to Use Case: Select high-friction compounds (e.g., Pagid Racing HP306 style) for track use and lower-noise compounds for daily driving.
- Evaluate Rotor Surface: If choosing aggressive aftermarket pads, consider whether drilled or slotted rotors are installed to avoid potential humming noises.
- Prepare Diagnostic Tools: Ensure access to an OBDII scanner capable of retracting the electronic parking brake calipers on the B9 chassis.
- Plan Bedding Procedure: Schedule time for a proper break-in drive immediately following installation to prevent glazing and ensure full friction potential.
FAQ
Can I use standard Audi S5 brake pads on an RS5 B9?
No, the RS5 B9 utilizes a larger, unique caliper and pad shape compared to the S5. Using S5 pads will result in improper fitment and a complete lack of braking capability.
What happens if I put steel brake pads on Carbon Ceramic rotors?
This will cause severe and irreversible damage to the carbon ceramic rotors. Carbon ceramic systems require specific, non-metallic friction materials designed to work with the silicon carbide surface.
Why are my new aftermarket brakes making a humming noise?
Community reports indicate that combining certain high-performance pads (such as Hawk) with slotted rotors can generate a humming sound. Switching to drilled rotors or a different pad compound formulated for quiet operation may resolve this.
Do I need to recalibrate the car after changing brake pads?
While a full system calibration is not always mandatory, the electronic parking brake must be properly retracted and reset using a compatible diagnostic tool. A standard bedding-in drive is also required to establish optimal friction.
Source Notes
- Source: https://www.audiworld.com/forums/audi-a5-s5-rs5-b9-220/brake-pad-options-3066843/
- Source: https://www.audizine.com/forum/showthread.php/973858-rs5-brake-pad-recommendations-(not-what-options-I-can-google)
Professional Disclaimer
The information provided in this article is for educational and informational purposes only. Brake system modifications involve critical safety components; improper selection or installation can lead to vehicle failure, injury, or death. Always consult with a certified automotive technician or the vehicle manufacturer's service guidelines before purchasing or installing aftermarket parts. Compatibility varies by production date and specific vehicle configuration.
All third-party trademarks, brand names, and model names are the property of their respective owners. References are for identification only and do not imply affiliation or endorsement.