BMW 135I 2011–2013 — technical service bulletin
Bulletin B121514 · NHTSA communication 10147236 · issued Sep 1, 2015
Technical service bulletin
communication type
Power Train
component
2011–2013
model years
4
vehicle entries
Official summary
This Service Information bulletin supersedes SI B12 15 14 dated August 2014. designates changes to this revision SUBJECT N55 with Double-Clutch Transmission: Idle Fluctuates when Stopped. A customer may complain that after coming to a stop, the engine speed intermittently fluctuates from about 500 RPM to 1,100 RPM. This situation can be more noticeable when the air conditioner is on. CAUSE DME software (idle control adaptation).
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.