BMW 3 Series 2010–2014 — technical service bulletin
Bulletin 34 04 15 · NHTSA communication 10059089 · issued Aug 1, 2015
Technical service bulletin
communication type
Service Brakes
component
2010–2014
model years
11
vehicle entries
Official summary
Bmw - brake booster vacuum might reduce if temperature gets below 14 degrees *ma
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.