Mazda CX-30 2019–2021 — technical service bulletin

Bulletin SA-043-21 · NHTSA communication 10199721 · issued Jul 1, 2021

Technical service bulletin

communication type

Equipment

component

2019–2021

model years

vehicle entries

Official summary

If both key transmitters are lost, MDARS key programming functions may be missing, not allowing new key transmitters to be added. Use the procedure below to program new key transmitters when both keys are lost.

Vehicles covered

2020 Mazda CX-30
2021 Mazda CX-30
2019 Mazda MAZDA3
2020 Mazda MAZDA3
2021 Mazda MAZDA3

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.