One problem related to brake squeaking noise has been reported for the 1998 Volkswagen Passat. The most recently reported issues are listed below.
Rear brakes make loud squeaking noise from moment brake pedal is depressed until vehicle comes to a complete stop. Dealer has inspected and said brakes/pads are ok. Dealer deglazed pads which fixed noice problem for approx 2 weeks and then it returned. Problem still not resolved. Problem started at 20k, vehicle just had 40k mile service-dealer said brakes ok still. Said front brakes will need replacement at next service. I feel dealer is trying to fix problem, but manufacturer hasn't provide dealer with any recommendations on problem resolution.