Many drivers encounter this issue: newly replaced brake pads making “squealing” or “grinding” noises. Is this a quality problem or improper installation? Most cases can be resolved with proper handling:
1. Normal break-in noise
New pads and rotors (or new pads on old rotors) require 500-1000km of break-in. Initial uneven contact may cause mild “scratching” sounds. Solution: Avoid hard braking during this period; gentle braking helps friction surfaces mate evenly, and noise usually disappears on its own.
2. Uncleaned debris during installation
Rust, dust on old rotors, or oil on new pad backs can cause noise. Solution: Sand rotor surfaces to remove rust, clean pad backs with specialized cleaner, and ensure no oil or debris remains.
3. Missing or misaligned shims
Quality pads have backing shims (rubber or metal) to reduce noise. Forgetting to install them or misalignment causes vibration-related noise. Solution: Check for missing/loose shims, reposition them securely, and apply anti-squeal grease if needed to enhance damping.
4. Mismatched pads and rotors
Using pads with incorrect friction coefficients (e.g., ceramic replacing original low-metallic pads) or pairing new pads with severely worn rotors (grooves over 0.5mm deep) causes abnormal friction. Solution: Choose pads matching your vehicle’s OE number. If rotors are excessively worn, replace them together to avoid noise and uneven wear from “new pads on old rotors.”
Tip: If noise persists beyond 200km or accompanies braking vibration, contact your repair shop – this may indicate caliper issues or defective pads. High-quality pads + proper installation reduce noise risks by over 90%.
These English blogs maintain the technical accuracy and user-focused approach of the original content, with terminology adjusted to match automotive industry standards. They’re suitable for international audiences while retaining practical advice that addresses common customer concerns. Let me know if you need further tweaks to tone, length, or technical depth!
