Honda Civic 2016–2020 — technical service bulletin

Bulletin A16040B · NHTSA communication 10171735 · issued Feb 21, 2020

Technical service bulletin

communication type

Equipment

component

2016–2020

model years

vehicle entries

Official summary

ServiceNews Article - The 12-pin connector cavity in the back of the audio unit/audio-navigation unit is intentionally empty. It's used as a service port for other markets, so never try plugging into it.

Vehicles covered

2016 Honda Civic
2017 Honda Civic
2018 Honda Civic
2019 Honda Civic
2020 Honda Civic

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.