Case file · HYUNDAI-SONATA-2011-2014 · Field document
Hyundai Sonata 2011–2014 · Pre-purchase checklist
Bring this to the inspection. Every check below is specific to this generation's documented failure modes — not generic used-car advice.
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Run the VIN at a Hyundai dealer or on Hyundai's recall site: confirm the Theta II engine recall / KSDS knock-sensor software update was performed, and that the car is enrolled in the lifetime engine warranty from the settlement.
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Cold-start the car and listen closely for a metallic knock or tapping, especially under light acceleration — the classic pre-seizure rod-bearing symptom. Walk away from any knock you can hear.
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Check oil level and condition; ask for oil-change records. These GDI engines are unforgiving of low oil and stretched change intervals.
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On 2011 cars, confirm the EPS (electric power steering) recall was done — feel for sudden heaviness or an 'EPS' warning light while steering at low speed.
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Turn the wheel lock-to-lock at a stop and listen for clicking/clunking from the steering column (the coupling/U-joint issue).
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Inspect the panoramic sunroof (if equipped) for prior glass replacement or stress cracks; ask whether it has ever shattered.
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On the 2.0T, look for oil-consumption signs and confirm it has been run on synthetic oil and good fuel.
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Verify the brake-pedal-stopper / brake-light-switch recall was completed (brake lights staying on, or being able to shift out of Park without the brake).
2011–2012 2.4 GDI (earliest, highest-reported engine-seizure years) · Any 2.0T or 2.4 GDI car with no KSDS software update on file