Nissan Sentra 2021 — technical service bulletin
Bulletin NTB21-053 · NHTSA communication 10199175 · issued Jun 18, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
1
vehicle entries
Official summary
2021 SENTRA; NO START DUE TO BATTERY DISCHARGE THROUGH AUDIO UNIT IF YOU CONFIRM The customer states that the engine would not crank, or cranked slowly and would not start. ACTION 1. Test the vehicle's 12 volt battery using the Midtronics DSS-5000 and recharge, or replace, the battery if necessary. 2. Confirm the current audio head unit software is version 321. 3. If the version is 321, update the audio head unit software to version 420.
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.