What 235 owners told NHTSA about the 2016 Hyundai Santa Fe Hybrid Hev

WHAT FAILED: The engine — the 3.3L Lambda II GDI V6 (engine family GHYXV03.31XE per the federal emissions label) — failed catastrophically: a connecting rod penetrated the engine block. The failed engine IS available for inspection on request. It has been preserved unrepaired since the failure, the rod penetration of the block is externally visible, and the vehicle is currently at Niagara Hyundai in New York. WHAT HAPPENED / SAFETY RISK: On [XXX], I was driving at approximately 65 miles per hour on [XXX] southbound near Bath, New York, with four occupants aboard, when the engine failed suddenly and without warning — no warning lamps, messages, or symptoms preceded it. The vehicle immediately lost all motive power at highway speed. I was forced off the roadway and through brush and debris to bring the vehicle to a stop. The sudden total loss of power at highway speed created an immediate loss-of-control hazard to my occupants and to surrounding traffic. CONFIRMED BY OTHERS: The tow was dispatched through a 911 emergency call. A New York State Trooper was at the scene and observed the debris trail. The towing company's invoice (T&R Towing and Service, Call #[XXX], [XXX]) records "Break Down," winch recovery, vehicle not drivable, and the tow operator's handwritten condition description: "Motor go Boom." The vehicle is now in the possession of a Hyundai dealership (Niagara Hyundai), and Hyundai Motor America has an open case (#[XXX]); however, Hyundai has refused to inspect or diagnose the engine unless I first pay to repair unrelated damage, so the manufacturer has NOT yet inspected the failure — leaving this safety defect undiagnosed by Hyundai. RELEVANT BACKGROUND: In 2024, Hyundai issued warranty extension TXX8 (15 years / 150,000 miles) for connecting rod bearing failure in this exact engine, acknowledging the failure mode. Mileage at failure was under 100,000 miles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11743619

Driving on a slight upgrade, lost power and smoke started to come out of the vents and from under the hood. Had no brakes and by the time we were able to drift to a stop, the engine compartment was on fire. There was no warning lights. Witnesses saw fire under the car while we were coming to a stop. The car and all contents were totally consumed. Following some research on NHTSA vin decoder we found that this car has the same engine (GDI THETA II) that has been involved in many fires and is involved in class action suits. Even though this car has the same engine, it was never recalled. That may indicate that there are other cars out there that may have the same problem but have not been informed.

NHTSA ODI 11617604

We recently had the car to the local dealership for engine problems. It took over 3 months, but they finally determined that the camshaft was "bent" and they had to remove the engine to replace it, costing almost $5000. We had it back for about 3 months but didn't drive it much since my wife works remotely from home now. My son was driving it on the interstate and the engine threw a rod, spilling oil onto the exhaust, which caught on fire. He managed to pull over and get out of the car and by then another motorist had called 911. There was a firetruck at the exit he had just passed who showed up in just a few minutes and put the fire out before the fuel system caught on fire, thankfully. While I'm glad my son was uninjured, I'm still very upset by this, especially since they just worked on the engine. After some searching on the internet, I have found that this is a very common occurance for this vehicle (and other Hyundais) yet the company is not doing anything about it. I also read that there is a separate class action lawsuit for this particular engine (in addition to the one for the smaller 4 cylinder engines), but I'm afraid it will be settled too late to help us out.

NHTSA ODI 11542917