Mazda MAZDA3 2014–2016 — technical service bulletin
Bulletin 04-003-17-3331a · NHTSA communication 10120355 · issued Jun 14, 2017
Technical service bulletin
communication type
Service Brakes
component
2014–2016
model years
3
vehicle entries
Official summary
Some vehicles may experience a squeaking/grinding noise from the rear brake even after the brake pedal is released. Upon inspection, the caliper mounting support is corroded and one of the disc pad is abnormally worn out (A). This is caused by vehicle usage in an area using road salt. The surface of the mounting support may swell from corrosion causing premature disc pad wear and brake noise. To correct the problem, an improved caliper mounting support has been newly established as a service part. The anti-corrosion surface treatment has been changed from Zn to Zn-Ni plating.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.