A 2015 Hyundai Sonata is now 11 years old, so an average example has covered around 148,500 miles. This is the first model year of the generation · early-build cars carry the highest share of teething faults and the most recall activity, so check the service history for completed recall work. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2015 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2015 Hyundai Sonata is 11 years old, so an average example has covered roughly 148,500 miles. At that mileage 7 of the documented faults are already due, so check those first.
Turn these known faults into a step-by-step viewing plan for this exact Hyundai Sonata · $9.
Build the inspection planDocumented onset mileage is at or below the ~149k miles an average 2015 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.
Clicking noise from behind the fascia and incorrect cabin temperature.
Vehicle refuses to crank, harsh gear engagement, or blank dashboard gear indicator.
Clunking, popping, or spring-binding noises from the front end at low speeds.
Panoramic sunroof struggles to open, grinds, or gets stuck in the tilted position.
Age, electronics and build-related issues that are not mileage-driven.
Infotainment and sensor glitches.
Turn this car's known weak points into a step-by-step viewing plan · what to inspect, what a bad result means and what to ask the seller.
Build my inspection planYes — 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.
The 1.6-litre turbocharged Eco variant uses a seven-speed dual-clutch transmission that is prone to low-speed shuddering and premature clutch wear. During a test drive, pay close attention to pulling away from a standstill. If the gearbox hesitates or judders violently, it likely requires a software update or a costly clutch pack replacement.
Yes, models fitted with the electronic parking brake can suffer from rear brake calliper binding or actuator failure, often resulting from moisture ingress or lack of use. Check the rear brake discs for excessive scoring or blueing, and ensure the brake engages and disengages smoothly without triggering a warning light.
The Sonata Hybrid is generally robust, but the high-voltage battery cooling fan can accumulate dust and fail, leading to overheating and reduced battery performance. Additionally, the hybrid power control unit has been known to log faults. Always ensure no hybrid warning messages appear on the instrument cluster during start-up.
Buying a Hyundai Sonata? Build a step-by-step viewing plan for this exact car · $9.
Build the plan