Nissan Sentra 2021 — technical service bulletin
Bulletin NTB21-067 · NHTSA communication 10200020 · issued Jul 29, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
1
vehicle entries
Official summary
HIGH FREQUENCY NOISE WITH AUDIO SYSTEM DISPLAY ON IF YOU CONFIRM There is a high frequency (17 kHz) noise with the audio system display screen turned ON, NOTE: ï · The 17kHz range may not be audible to some people. ï · Noise can be heard with the audio system ON or OFF. AND The high frequency noise is not heard with the audio system display screen turned OFF, AND Service Comm does not show PM991 applies to the vehicle you are working on. HINT: If Service Comm shows PM991 does apply to the vehicle you are working on, perform PM991 and do not apply this bulletin. ACTION 1. Confirm the current Au
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.