Hyundai, Kia, and Genesis vehicles across multiple engines experienced thermostat and water pump failures. Issues included overheating, coolant leaks, and premature pump wear. Remedies included warranty repairs, recall campaigns, and TSBs. Class actions referenced these failures in certain clusters.
| Year(s) | Make | Model | Should Purchase? | Notes | |
|---|---|---|---|---|---|
| 2011 2012 2013 2014 2015 | Hyundai | Sonata | Caution |
Engine: Theta II 2.4L GDI – G4KE Issue: premature water pump wear → overheating, coolant leaks Remedy: pump replacement under warranty/TSBs Legal context: referenced in settlement filings |
|
| 2011 2012 2013 2014 2015 | Kia | Optima | Caution |
Engine: Theta II 2.4L GDI – G4KE Issue: coolant leaks, overheating due to pump failure Remedy: pump replacement, extended coverage in some cases Legal context: class action references noted |
|
| 2013 2014 2015 2016 | Hyundai | Elantra | Caution |
Engine: Nu 2.0L GDI – G4NA Issue: thermostat failures → overheating, CEL Remedy: thermostat replacement under warranty/recall campaigns Legal context: referenced in consumer complaints and TSBs |
|
| 2014 2015 2016 | Kia | Forte | Caution |
Engine: Nu 2.0L GDI – G4NA Issue: thermostat failures → overheating, coolant leaks Remedy: thermostat replacement, extended coverage Legal context: recall advisories and settlement filings |
|
| 2012 2013 2014 2015 2016 | Hyundai | Santa Fe | Caution |
Engine: Lambda II 3.3L GDI – G6DF Issue: premature water pump wear → overheating, coolant leaks Remedy: pump replacement, TSB coverage Legal context: referenced in settlement filings |
|
| 2014 2015 2016 2017 | Kia | Sorento | Caution |
Engine: Lambda II 3.3L GDI – G6DH Issue: coolant leaks, overheating due to pump failure Remedy: pump replacement, extended coverage Legal context: class action references noted |
|
| 2017 2018 2019 | Genesis | G80 | Caution |
Engine: Lambda II 3.8L GDI – G6DJ Issue: premature water pump wear → overheating, coolant leaks Remedy: pump replacement, extended warranty coverage Legal context: referenced in settlement filings |