Should I worry about the 2.4L Theta II engine in older Tucson and Santa Fe models?
Yes, the 2.4L GDI Theta II covered by class-action settlements in Canada can suffer connecting-rod bearing wear leading to engine knock. Hyundai extended the powertrain warranty to 10 years/200,000 km on affected 2013-2018 units and installed a knock-sensor detection system. Before buying, pull the VIN through a Hyundai dealer to confirm the KSDS update and any completed short block replacement. Post-2019 Smartstream 2.5L engines resolved the issue and are considered safe.
























