The engine is the whole story — buy only one with the bearing coverage confirmed and the oil history clean.

The 2016 Sonata Hybrid is the one version that got an actual safety recall for the bearing problem. Recall 20V746 covers the 2016 Sonata Hybrid: dealers inspect the engine, replace it free if bearing damage is found, and install the knock-sensor software. Separately, the hybrid's own complaint file is dominated by a different scare — a "Check Hybrid System, turn off engine" warning followed by total loss of power, sometimes at 65 mph, often with the car shaking. Several owners report it happening repeatedly with no diagnosis. If you are looking at a 2016 hybrid, 20V746 showing complete by VIN is the first thing to check, and a documented hybrid-system shutdown history is a walk-away.

On cars with the panoramic sunroof, a bonding problem in the wind deflector can let the sunroof panel come off the car at speed — a road hazard for whoever is behind you. Recall 16V726 covers 2016 Sonata and Sonata Hybrid; the free fix repairs the wind deflector anchor plate. Complaints in the federal file confirm it happening: one owner's deflector "broke and flew almost all the way" off, another reports the whole sunroof departing. If the car has the big glass roof, this recall is non-negotiable.

2016 is a busy recall year for safety equipment. Recall 16V232 covers driver frontal airbags built without a chemical enhancer, so the second stage may not deploy in a crash. Recall 16V615 covers a driver airbag that may not adequately protect the driver's neck. Both are free module replacements. Recall 15V678 updates the anti-lock brake software so the ABS warning lamp actually illuminates when the system faults, and 17V359 replaces a corroded parking-brake switch that can leave the brake-applied light dark — which is how people drive off with the parking brake partly on. Run all four against the VIN; they are quick, free, and cumulative.

A cluster of 2016 owners report the car became hesitant and jerky at low revs after a dealer visit, and that nobody could fix it. There is an answer, and it is in Hyundai's own bulletin. Hyundai Service Campaign 9C2 reflashes the engine computer on Theta II cars to cut engine-out emissions, after the California Air Resources Board found these vehicles exceeding standards. Hyundai's follow-up bulletin then states that after 9C2, cars "may exhibit a brief hesitation or rough shifting condition during cold start operation," expected only in roughly the first one to three minutes after start while the catalytic converter warms up. So: if a 2016 you are looking at hesitates when cold and settles after a couple of minutes, that is the emissions software, acknowledged in writing. Persistent hesitation once warm is something else and worth diagnosing.

The 1.6-litre turbo Eco trim pairs with a seven-speed dual-clutch transmission — a gearbox that is mechanically a manual operated by computer, and behaves like one at low speed. The independent mechanic in our sources is blunt about it: don't buy one, the dual clutches in these "are absolutely terrible," they shift badly, and there was often nothing he could do because that was how they were built. Hyundai issued engine- and transmission-control software updates for shift quality on 2015 to 2017 cars. This same trim also has a manually adjusted alternator belt whose top mounting bolt can break if overtightened, which can light the battery warning and, in some cases, overheat the engine. If you want a 2016 Sonata, the 2.4 with the conventional six-speed automatic is the far easier car to own — the same mechanic calls that transmission tried, true, and trouble-free.

The 2.0-litre turbo carries the same bearing story as the 2.4 plus three parts the naturally aspirated car doesn't have. Hyundai's bulletin describes the air inlet hose near the turbo inlet deteriorating, causing an air-rushing noise and possible turbocharger damage — there was a service campaign to replace it on 2015 to 2017 cars. Our mechanic source adds two more from the bay: the electronic wastegate actuator that controls boost is "a common failure point," and the electric vacuum pump that assists the brakes can fail and take down the car's communication network, lighting up the whole dashboard. His summary is fair: the turbo is more fun and more complex.

Recall 21V749 covers a Smart Junction Box software fault that can flash the turn signal in the opposite direction from the one you selected — free software update, covers 2015 to 2017 Sonata and 2016 to 2017 Sonata Hybrid and Plug-In. Separately, and this is a campaign rather than a recall: Hyundai's bulletins describe Campaigns 993, P32 and 9A5 — an anti-theft software upgrade with window decals, a steering-wheel-lock programme, and an ignition-cylinder protector — offered in response to thefts of 2011 to 2022 Hyundai vehicles not fitted with an engine immobilizer, targeted through social media. Every Sonata bulletin carrying those campaigns lists model years 2011 to 2019, so the 2016 is in the affected population. A separate class settlement covers the same allegation. Ask the seller whether the 993 software was applied; if it wasn't, a dealer can do it.

Hyundai's bulletins state that certain vehicles with exterior white paint may show peeling or bubbling on the metal body panels — hood, fenders, roof, doors, quarter panels and trunk lid — and that the paint warranty for affected cars was extended. The Sonata bulletins cover model years 2015 to 2019 and apply only to factory-applied paint. The published summaries do not state how long the extension runs, so verify the terms in the bulletin PDF with a dealer rather than assuming. Worth raising before you pay for a respray.