Mazda CX-9 2016–2020 — technical service bulletin
Bulletin 04-004-20-3679a · NHTSA communication 10173098 · issued Mar 6, 2020
Technical service bulletin
communication type
Equipment Adaptive/mobility
component
2016–2020
model years
5
vehicle entries
Official summary
Some vehicles may exhibit a click noise from the front brakes under one of the following conditions: ï · When first moving the vehicle forward or reverse from a stop. ï · When first applying the brakes while the vehicle is moving forward at slow speeds. Due to deteriorated grease between the brake pads and the shim, the front brake pads move upward/downward along with the brake rotors during brake application. When the vehicle moves or the brakes are applied the next time, the front brake pads move to the other side, which causes a click noise.
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.