Recall 19V-072: automatic may downshift unexpectedly (TCM software)
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What causes "Recall 19V-072: automatic may downshift unexpectedly (TCM software)" on the Mazda Miata ND (2016-present US model years), and how is it fixed?
NHTSA campaign 19V-072 (about 14,370 cars, Mazda 3019A): transmission control module programming can command the downshift. Fix: Dealers reprogram the TCM free; the recall began March 14, 2019.
Symptoms
An unexpected downshift and sudden deceleration, raising crash risk.
Cause
NHTSA campaign 19V-072 (about 14,370 cars, Mazda 3019A): transmission control module programming can command the downshift.
Fix (summary)
Dealers reprogram the TCM free; the recall began March 14, 2019. NHTSA's by-vehicle lookup lists 2016-2018 only, but the campaign record and Mazda's notice cover 2016-2019 model years, so check by VIN.
Related build entries
Other ND problems
- Recall 19V-496: under-engine skid plate may detach (2016)
- Recall 21V-875: low-pressure fuel pump may fail and stall the engine
- Recall 24V-695: front airbags may deploy with too much force
- Recall 25V-336: TCS/DSC warning light may not come on
- Early ND manual: grinding into 2nd or 3rd, or gears lost (TSB 05-001/17)
- Cold 2nd-to-3rd shift balks (guide claim)
More for this car
- All Mazda Miata ND (2016-present US model years) fitment answers · ND common problems
- Newsletter archive: past issues with every new and corrected entry
Sources
- NHTSA recall 19V-072: 2016-2019 MX-5 automatic, TCM software may cause sudden downshift (14,370 units) — NHTSA (regulatory; read 2026-10-26; full page read)
- Mazda dealer announcement, Safety Recall 3019A: 2016-2019 MX-5 automatic TCM software (Feb. 1, 2019) — Mazda North American Operations (recall stop-sale notice to dealers) (mfr spec; read 2026-10-26; full page read)
Summaries are in our own words. Not repair instructions; consult the factory service manual.
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