A 2017 Hyundai Sonata is now 9 years old, so an average example has covered around 121,500 miles. A mid-run car · most launch faults had been addressed by this point, and wear items are the main risk at this age. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2017 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2017 Hyundai Sonata is 9 years old, so an average example has covered roughly 121,500 miles. At that mileage 3 of the documented faults are already due, so check those first.
Documented onset mileage is at or below the ~122k miles an average 2017 car has covered.
Theta II 2.0T/2.4L engine failure (bearing/knock) — subject to recalls and warranty extensions.
Excessive oil consumption.
Electric power steering faults.
Age, electronics and build-related issues that are not mileage-driven.
Infotainment and sensor glitches.
Generate a tickable pre-purchase checklist for this exact year, mileage and variant · add photos and notes as you inspect.
Check this exact carYes — the Theta II engines have a well-documented failure history with recalls; verify the knock-sensor update and any engine replacement.
It offers strong value, but only with confirmed recall completion and clean oil-consumption history.
Hyundai added a knock-sensor detection system to catch bearing wear early — confirm it was installed.