Theta II 2.4 GDI (G4KJ)
Hyundai/Kia · 2.4L GDI I4
2009–2020
"MASSIVE recall. Rod bearing failure, engine seizure, fire risk. Multiple class-actions. Worst modern engine disaster."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
Rod bearing failure — class-action, fire risk
▸Knocking, sudden engine seizure, engine fire — no warning
$1.3B settlement. 3.9M vehicles. Rod bearing machining debris causes bearing failure, seizing, fire. AVOID entirely.
Do not buy any Theta II GDI in Greece regardless of price or condition.
Recall compliance — verify before purchase
▸Engine fire risk if unrecalled
Multiple recalls issued. Verify completion at Hyundai/Kia dealer by VIN before any consideration.
AVOID verdict stands regardless of recall status. Fire risk too high.
Models with Theta II 2.4 GDI (G4KJ) 2
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Not recommended - too risky
Frequently Asked Questions
Is the Hyundai/Kia Theta II 2.4 GDI (G4KJ) reliable?
The Hyundai/Kia Theta II 2.4 GDI (G4KJ) scores 25/100 with a verdict of AVOID. It has 2 documented issues with total repair costs between €5,000 and €20,000.
What are the common problems with the Theta II 2.4 GDI (G4KJ)?
The most common issues are:
- Rod bearing failure — class-action, fire risk — critical, repair cost €5,000–€20,000, 50,000 km–150,000 km
- Recall compliance — verify before purchase — critical, repair cost €0–€0, 0 km–∞
What cars use the Hyundai/Kia Theta II 2.4 GDI (G4KJ)?
The Theta II 2.4 GDI (G4KJ) is found in:
- Santa Fe 2.4 GDI (2012–2018)
- Sorento 2.4 GDI (2014–2020)
How much does it cost to repair the Theta II 2.4 GDI (G4KJ)?
Total potential repair costs for all 2 known issues range from €5,000 to €20,000. The most expensive issue is typically .
What years was the Theta II 2.4 GDI (G4KJ) produced?
The Hyundai/Kia Theta II 2.4 GDI (G4KJ) was produced from 2009 to 2020. It is a 2359cc I4 petrol na engine.
Scores are calculated from documented issues, repair costs, and failure patterns across thousands of owner reports and technical sources. Learn about our methodology. Always inspect before you buy.