During a disc brake service all components are lubricated, inspected and checked for serviceability. An Anti-squeal compound is always applied when the disc pads are replaced, the callipers are lubricated where necessary. All factory shimming, springs and alignment mechanisms are inspected including the brake calliper seals, calliper function, brake hoses, disc rotors, wheel bearings and brake fluid condition. When the brake fluid condition is poor, we recommend replacing the fluid and flushing at all brakes which is usually done at a 2 year or 30,000 m interval. This prevents component damage caused from moisture absorption from within the system.