When backing up and applying the brakes, you may hear a squeaking noise. Scion engineers addressed this problem by modifying the shape of the brake pad and the anti-squeal shims; they also applied more grease during assembly.Google+
Car Problem Reports
Scion xB Squeaking Noise When Applying Brakes in Reverse
Scion xB Problem
Average Mileage: 78,977 mi (26,800 mi - 174,000 mi)
loud and getting louder squeak/squeal in brakes (rear?) on reverse. Mechanic says brake shoes and pads are fine.
Visitor, 2004 Scion xB, 174,000 mi
2005 xb in great condition, brakes squeak braking on rear only. will investigate, air in line seems to be part of the problem, also seem to be uneven line pressure to the rear wheels etc..
Visitor, 2006 Scion xB, 112,000 mi
same thing squeaking, and I had the brakes checked and they are good. I've only had the car for 5000 miles. purchased from a certified toyota dealer. sounds like toyota needs to do something about this problem.
my brake shoes make noise when stoping replaced brake drum same noise again and shoes. the brake shoes were wore on the ends now its making same noise again thier was plent of pad left but both ends wore again
Visitor, 2010 Scion xB, 26,800 mi
Loud squeaking noise occurs when applying brakes while baking up. Took vehicle to Toyota dealership and told it is due to moisture on brake pads. States everything "looks fine". Problem continues even on dry days. When googled problem seems many other Toyota models report this same problem. Technical Service Bulletin sent out regarding Rear Brake Squeak (T-SB-0098-10) to service mechanics notifying that Some 2010 Prius vehicles may experience rear brake squeak when backing up or moving forward during the first few brake applications when the brakes are cold. An updated rear brake shim kit is available to reduce the likelihood of this condition occurring. Could this also be a Scion problem????
Visitor, 2008 Scion xB, 30,000 mi
My breaks has been squeaking for about 2 years now, i have told the dealership over and over when go to service my car. They make excuses like, maybe its dusty or maybe your brake pads need to be changed. ive since changed my break pads but still it squeaks.