BMW M2 2015–2017 — technical service bulletin
Bulletin B340615 · NHTSA communication 10146578 · issued Mar 1, 2017
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2015–2017
model years
8
vehicle entries
Official summary
?Grinding Noise from Rear Brakes . Pebbles, road grit, or other foreign materials can get caught in between the brake protection (backing) plate and the brake disc(s), this may cause a disturbing noise in the rear axle area while driving.
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.