Audi A6 2011–2014 — technical service bulletin
Bulletin A421523 2029953- · NHTSA communication 10120035 · issued May 7, 2015
Technical service bulletin
communication type
Structure
component
2011–2014
model years
8
vehicle entries
Official summary
Supersedes Technical Service Bulletin Group 42 number 13-19 dated September 24, 2013. Cracking or clicking noises are heard from the rear of the vehicle in the C pillar area when it is driven over bumps or rough roads. The noise comes from the upper shock absorber mounting.
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.