Audi A4 2012–2014 — technical service bulletin
Bulletin TSB_2028985_13 · NHTSA communication 11034639 · issued Jun 23, 2026
Technical service bulletin
communication type
Power Train
component
2012–2014
model years
25
vehicle entries
Official summary
This bulleitn procides informaiton when tehre is a transmission warning mssage in the instrument cluster; P074100 is stored in the TCM.
Vehicles covered
- 2012 Audi A4
- 2013 Audi A4
- 2014 Audi A4
- 2012 Audi A4 Avant
- 2013 Audi A5
- 2014 Audi A5
- 2012 Audi A5 Cabriolet
- 2013 Audi A5 Cabriolet
- 2014 Audi A5 Cabriolet
- 2012 Audi A6
- 2013 Audi A6
- 2014 Audi A6
- 2012 Audi A7
- 2013 Audi A7
- 2014 Audi A7
- 2012 Audi A8
- 2013 Audi A8
- 2014 Audi A8
- 2013 Audi Allroad
- 2014 Audi Allroad
- 2012 Audi Q5
- 2013 Audi Q5
- 2014 Audi Q5
- 2013 Audi S8
- 2014 Audi S8
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.