BMW 1 Series M 2009–2016 — technical service bulletin
Bulletin B121615 · NHTSA communication 10147665 · issued Mar 1, 2015
Technical service bulletin
communication type
Engine
component
2009–2016
model years
38
vehicle entries
Official summary
N63T: Oxygen Sensor Internal Resistance Faults. The Service Engine Soon light comes on with either or both of the following faults stored in the DME memory: ? 12B701 - Oxygen sensor heating after catalytic converter, function: Internal resistance too high ? 12B801 - Oxygen sensor heating after catalytic converter 2, function: Internal resistance too high The engine operation and performance are not affected. The DME diagnosis for the post catalyst oxygen sensor(s) is too sensitive.
Vehicles covered
- 2011 BMW 1 Series M
- 2012 BMW 1 Series M
- 2013 BMW 1 Series M
- 2014 BMW 525D Xdrive
- 2011 BMW 550I
- 2012 BMW 550I
- 2013 BMW 550I
- 2014 BMW 550I
- 2015 BMW 550I
- 2016 BMW 550I
- 2010 BMW 550I Gran Turismo
- 2011 BMW 550I Gran Turismo
- 2012 BMW 550I Gran Turismo
- 2012 BMW 650I
- 2013 BMW 650I
- 2014 BMW 650I
- 2015 BMW 650I
- 2016 BMW 650I
- 2009 BMW 750I
- 2010 BMW 750I
- 2011 BMW 750I
- 2012 BMW 750I
- 2013 BMW 750I
- 2014 BMW 750I
- 2015 BMW 750I
- 2009 BMW 750LI
- 2010 BMW 750LI
- 2011 BMW 750LI
- 2012 BMW 750LI
- 2013 BMW 750LI
- 2014 BMW 750LI
- 2015 BMW 750LI
- 2011 BMW Activehybrid 7
- 2012 BMW Activehybrid 7
- 2014 BMW Activehybrid 7
- 2014 BMW X5
- 2015 BMW X5
- 2016 BMW X5
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.