Sonata V6-3.0L (1991)
Brake Rotor/Disc: All Technical Service Bulletins
Brake Rotor - Surface Rust/Noise/Pedal Pulsation
Group: GENERAL
Number: 99-00-009
Date: NOVEMBER, 1999
Model: ALL
Subject: BRAKE ROTOR SURFACE RUST NOISE AND BRAKE PEDAL PULSATION
DESCRIPTION:
Surface rust on the brake rotors may occur it a vehicle has been parked for several days in an area where corrosive conditions were present. If the rotor
surface does rust, the area under the brake pads usually remains rust free. The difference in friction between the rusted and unrusted areas may induce
slight brake pedal pulsation, vibration and/or noise for several stops, but will improve as the brake pad friction linings polish the rust off the rotor.
Typically, three or four stops will polish the rotor surfaces.
If customers inquire about this condition, it may be explained as a normal occurrence. It does not affect brake performance.