Audi A4 2008–2010 — technical service bulletin
Bulletin 28 13 22 2028419 · NHTSA communication 10210623 · issued Nov 15, 2013
Technical service bulletin
communication type
Steering
component
2008–2010
model years
7
vehicle entries
Official summary
Before a replacement electronic steering column lock control unit, J764, is installed, the software of the access start authorization control unit, J393, must be updated due to a diagnostic software error that prevents the DTC from being cleared.
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.