BMW 328I 2012–2014 — technical service bulletin
Bulletin 122113 · NHTSA communication 10150164 · issued Nov 1, 2013
Technical service bulletin
communication type
Engine and Engine Cooling
component
2012–2014
model years
4
vehicle entries
Official summary
Service Action: Program Control Units (Direct Ozone Reduction). The DME diagnostic for direct ozone reduction, by means of the environmental air catalyst sensor (EAC) located in the radiator, is not carried out correctly as required by emissions regulations.
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.