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Washington · Article Updated May 24, 2026

Hyundai Cases Under Washington Lemon Law

Hyundai cases in Washington — Theta II engine failures, Smartstream transmission, Ioniq 5/6 EV, and Genesis luxury patterns.

Hyundai (including Genesis) has strong Washington market share — particularly Tucson, Santa Fe, Palisade, Elantra, Sonata, Ioniq 5 / 6, and Genesis G70 / G80 / G90 / GV70 / GV80. Hyundai cases are pursued under RCW 19.118 (Washington Lemon Law) and WCPA.

Common Hyundai defect patterns

  • Theta II GDI engine failures (long-standing pattern; multiple class actions; ongoing recalls).
  • Smartstream IVT (CVT) issues.
  • 8-speed automatic shift issues.
  • Ioniq 5 / 6 ICCU (Integrated Charging Control Unit) failures.
  • E-GMP platform OTA, BMS issues.
  • Palisade / Telluride electrical glitches.
  • Sonata Hybrid battery cooling issues.
  • Bluelink connectivity failures.
  • N-line / N performance models clutch issues.

Ioniq 5 / 6 EV patterns

  • ICCU failures (Integrated Charging Control Unit) — paradigmatic Hyundai EV issue.
  • DC fast-charging throttling.
  • 12V auxiliary battery dead.
  • OTA update history.
  • Range degradation.

Genesis-specific patterns

  • G80 / G90 air suspension issues.
  • GV70 / GV80 infotainment crashes.
  • Electrified GV70 EV BMS issues.

Hyundai TSB / recall overlay

Heavy TSB pattern:

  • Theta II GDI engine recalls (broad scope).
  • ICCU TSBs / OTA updates.
  • Bluelink connectivity TSBs.
  • Smartstream IVT TSBs.

Check NHTSA for your VIN.

WCPA Hangman Ridge fit

Hyundai cases strongly support WCPA Hangman Ridge public-interest impact:

  • Theta II GDI class-action history (paradigmatic pattern evidence).
  • ICCU emerging class-action pattern.
  • Multi-state lemon-law actions.

Bottom line

Hyundai cases — particularly Theta II GDI engine and Ioniq 5/6 ICCU cases — are well-positioned for Washington Lemon Law and WCPA. The Theta II engine pattern is among the strongest pattern evidence available across U.S. lemon-law practice.

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