2024 Hyundai Sonata Reliability Report

The speedometer reads high, usually by 1 to 4 mph compared with GPS. In one case it showed 25 mph at a true 20. The error often gets worse after a short stop and restart, then settles once the car sits for a few hours. N Line owners describe the same fault, and dealers have not fixed it. One complaint targets the Driver Attention Warning instead. It beeps every 5 minutes on winding roads and, unlike on earlier model years, cannot be turned off.

The speedometer comes and goes, reading about 5 mph off GPS and worse at higher speeds. The error tends to show up after a short stop and restart. One owner saw 26 mph on the display at a true 30. Dealers say they cannot reproduce it, and Hyundai has blamed signal delay in the Waze app. One report is more serious. At 75 mph the car slows itself and the dash shows a 20 MPH limit. Only a restart clears it, and it has happened several times.

Stability-control faults cause the car to veer toward highway medians and lose steering precision in turns and roundabouts. Near-collisions are reported at roughly 17,804 to 20,000 miles. The problem reportedly continued after the recall ESC software logic update (24-01-065H-1), and a later dealer visit found no fault. Both reports appear to come from the same owner, so the evidence is thin. Still, the described loss of steering control is a serious risk.

Automatic emergency braking can kick in during left turns and bring the car to a full stop, with the collision warning light on. In that report it started at just 60 miles and became a regular event. The other complaint concerns the Driver Attention Warning. It beeps about every 5 minutes during steady, attentive driving and can be set off by sunglasses. Unlike on earlier models, it cannot be turned off.

The low beams light too little of the road at night. Road signs and pedestrians stay poorly lit until the high beams come on. One owner noticed this at about 3500 miles on a Hybrid Limited. A second report covers the automatic high beams. When the camera by the rearview mirror is blocked, the high beams stay on all the time while the indicator still shows green. The driver may not realize the high beams are on.