Tesla Model 3 2021 — technical service bulletin
Bulletin SB2116003 · NHTSA communication 10208324 · issued Dec 7, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
2
vehicle entries
Official summary
Certain Model 3 and Model Y vehicles were manufactured with high voltage (HV) batteries having cell separators that do not meet Tesla?s internal standards of quality, potentially resulting in a reduction of range.
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.