Audi A4 2016–2021 — technical service bulletin
Bulletin SM 70-2021 · NHTSA communication 10201523 · issued Sep 3, 2021
Technical service bulletin
communication type
Electrical System
component
2016–2021
model years
11
vehicle entries
Official summary
This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
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.