Mazda MAZDA6 2014–2020 — technical service bulletin
Bulletin 04-002-20-3643a · NHTSA communication 10170815 · issued Jan 28, 2020
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2014–2020
model years
7
vehicle entries
Official summary
Some vehicles may exhibit a groan noise from the front brakes when braking at a very low speed (approximately 6 mph / 10 km/h). This may be caused by a brake torque variation at that speed due to an inappropriate machining process of the brake disc surface. Customers having this concern should have their vehicle repaired using the following repair procedure.
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.