Hyundai Tucson engine knock issue requiring engine replacement on Hyundai Tucson

Some Hyundai Tucson owners report experiencing engine knocking issues that may necessitate engine replacement, with potential causes including low oil levels, poor-quality fuel, faulty spark plugs, and excessive carbon buildup. Common symptoms reported include unusual sounds during acceleration, reduced performance, stalling, and excessive oil consumption, which can escalate to complete engine failure. Notably, engine knocking in Tucson models from 2015-2020 has prompted recalls and extended warranties from Hyundai to address these concerns. Owners are advised to stay informed about these recalls and warranties to mitigate the risk of severe damage, such as rod bearing failure, which can lead to costly engine replacements—sometimes exceeding $6000. Prompt attention to engine knocking and consultation with a qualified mechanic or dealership are recommended to avoid significant repair costs.