Question 1

Key-start models are easy to steal (no immobilizer)

Accepted Answer

Many key-start Hyundai and Kia models built 2011-2021 lack an engine immobilizer, making them a target of a widely publicized theft method. Hyundai and Kia offer a free anti-theft software upgrade and steering wheel locks.

Question 2

Theta II engine failure (2.4 GDI)

Accepted Answer

The 2.4 GDI (Theta II) can suffer connecting rod bearing failure from manufacturing debris, causing knocking, loss of power, stalling and in some cases engine fire. Hyundai and Kia recalled vehicles, installed knock sensor detection software (KSDS) and extended engine warranties on many models.

Kia OptimaOptima TF

Known issues and common problems

Kia OptimaOptima TF

Known issues and common problems

Key-start models are easy to steal (no immobilizer)1 solutionsHigh

Theta II engine failure (2.4 GDI)at 130000 km · 1 solutionsCritical