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Oklahoma · Article Updated May 25, 2026

Hyundai Oklahoma Lemon Law Cases

Hyundai in the OK market — Sonata, Tucson, Santa Fe, Santa Cruz (HMMA Montgomery AL-built). Theta II engine exposure. Common AL-adjacent OEM.

Hyundai is well-represented in the OK market. Most popular Hyundai models in OK are built at Hyundai Motor Manufacturing Alabama (HMMA) Montgomery — see Alabama Hyundai coverage.

Common Hyundai defect categories

Theta II engine

The 2.0L and 2.4L Theta II GDI engines have been the subject of multiple NHTSA-supervised recalls. Affected HMMA-built Hyundai models:

  • Sonata (2011-2019).
  • Santa Fe Sport (2013-2018).
  • Tucson (2014-2020).
  • Elantra (some years).

See Alabama Hyundai coverage for the framework.

GDI fuel-system issues

  • Carbon buildup, walnut blasting.

Dual-clutch transmission (DCT)

  • Hesitation from a stop, harsh engagement.

8-speed automatic / 6-speed automatic

  • Newer 8-speed harsh shifts.
  • Touchscreen freezes.

A/C in OK heat

  • Compressor failures.

Santa Cruz-specific (pickup)

  • Tonneau cover mechanical issues.

Hyundai Ioniq EVs

  • ICCU failures — class actions.

Procedural considerations

  • BBB Auto Line is Hyundai’s certified IDS.
  • Federal venue options: N.D./E.D./W.D. Okla. or M.D. Ala. (Montgomery — HMMA home venue).

OCPA $10K-per-violation exposure

Hyundai cases have substantial OCPA exposure for:

  • “Recall fixed” representations — paradigm Theta II case (each distinct misrepresentation = $10K).
  • GDI engine efficiency claims.
  • Hybrid / PHEV battery range claims.
  • Manufacturer warranty representations.

Bottom line

Hyundai cases for Theta II engine vehicles have strong OCPA deceptive-conduct pleading potential (actual damages + mandatory fees). Cross-state M.D. Ala. (Montgomery — HMMA home venue) provides alternative federal venue.

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