2019 Hyundai Sonata Problems

What owners report

Owners of this model year most often describe excessive engine oil consumption, sometimes with knocking, misfires or a check engine light, and many say dealers ran oil consumption tests or replaced gaskets while calling the usage normal. A second recurring theme is low-beam headlight projection that leaves dark voids or shadows on the road, reported mostly on nearly new cars in the first few thousand miles. Paint peeling and occasional starting or stall complaints also appear in the sample.

1. 1
   Engine

   Excessive engine oil consumption

   • 66 complaints (41%)
   • median 102,000 mi at 5.8 yrs old (14 state mileage)
   • 3 mention a crash, fire or injury
   • owner-quoted repair $800 (median of 5 quotes)
   • filed 2022–2026

   Owners describe having to add oil frequently, in some cases a quart or more within a few weeks of an oil change, with no oil visible under the car. Some report the low oil warning light coming on, spark plugs fouling with oil, or a check engine light and misfire following the low oil readings. According to complaints, dealers performed oil consumption tests, replaced gaskets or a drain plug, or told owners the usage was within Hyundai's normal range; several owners say they were asked to keep driving until a failure occurred before an engine replacement would be covered. Reports cluster from roughly 45,000 to 150,000 miles, with some owners noticing it soon after purchase.

   2 related service bulletins

   What to check: Ask for oil change records and whether any oil consumption test was done and what it showed; check the oil level and smell the dipstick for fuel, and look for a check engine light or stored misfire codes.

   2 excerpts from owner complaints in NHTSA records

   “What component or system failed or malfunctioned, and is it available for inspection upon request? Since april 2025 i’ve been having low oil readings in my vehicle despite regular oil changes I took it into the dealer since my vehicle was still under warranty, which they stated only one part was under warranty. I had to pay $800 after this was replaced. I started having engine light come on. This engine light when I paid a diagnostic fee I learned that the cylinder three was misfiring. …”

   NHTSA complaint #11632115, filed 2024-12, 115,000 miles

   “I have had to change my spark plugs 3 times since May due to the fact that I keep getting oil in them. My car also goes through an excessive amount of oil. Within 2 weeks of having my oil changed I had to start adding more oil. But it does not ever have any on the ground under my car. My piston oil rings are not keeping oil out of the area where my spark plugs are located.”

   NHTSA complaint #11606260, filed 2024-08
2. 2
   Exterior lighting

   Low-beam headlights leave dark voids on the road

   • 18 complaints (11%)
   • median 1,600 mi at 1.1 yrs old (15 state mileage)
   • 1 mention a crash, fire or injury
   • filed 2019–2024

   Owners describe two dark bands or blacked-out spots in the low-beam pattern that move with the car and create shadows on the pavement ahead. Many say the headlights were checked or adjusted at the dealer and told they meet specifications, while a few report only high beams give usable illumination. Drivers say the pattern is distracting and makes it harder to see pedestrians or lane edges at night. Reported mostly within the first few thousand miles, often on nearly new or newly purchased vehicles, and noticed specifically at night on low beam.

   What to check: Look at the low-beam pattern against a wall or empty road after dark before buying, and ask whether the headlamp assemblies or bulbs have been replaced or adjusted.

   2 excerpts from owner complaints in NHTSA records

   “While driving my 2019 Hyundai Sonata after dark I suddenly viewed a rather large black mass and thinking it could be a person I jammed on the brakes. With the car now in parked status I realized that the black mass was created by the headlights a frightening event and if a car was in back of me a severe accident could have”

   NHTSA complaint #11271719, filed 2019-10, 1,600 miles

   “The low beam headlights illuminate an area up to about 1 telephone pole in front of the vehicle (approximately 100 feet). When driving at normal highway speeds at night, I cannot see far enough ahead to operate the vehicle safely. It is only when the auto high beams turn on that the road ahead is sufficiently illuminated. I contacted the dealer who checked out the headlights and was told that everything was according to Hyundai specifications.”

   NHTSA complaint #11207515, filed 2019-05, 1,600 miles
3. 3
   Engine

   Engine knock, misfire or stall with check engine light

   • 29 complaints (18%)
   • median 85,500 mi at 6.2 yrs old (10 state mileage)
   • filed 2019–2026

   Owners describe a rattling or knocking sound from the front of the car, a flashing or steady check engine light, shuddering and reduced power, and in some cases the car dropping into limp mode. Complaints mention misfire codes and knock-sensor codes, and diagnosis at dealers or shops pointing to piston, piston ring or timing chain problems. Some owners say an engine replacement was recommended, with repairs in some cases repeated. Spread across the mileage range, from around 11,000 miles up to 172,000 miles, with several reports above 80,000 miles.

   5 related service bulletins

   What to check: Listen for a knock or rattle on a cold start and at light throttle, and have a pre-purchase scan check for stored misfire or knock-sensor codes; ask whether any engine-related service campaigns were completed.

   2 excerpts from owner complaints in NHTSA records

   “I was driving on the interstate when my engine started shutting down on me and I’m glad I had moved to the right lane because someone would’ve hit me from the back because I never had this problem and now the mechanic telling me it jumped timing.”

   NHTSA complaint #11729912, filed 2026-04

   “2019 Sonata 2.0t with just over 11k miles on it began to suddenly studder and want to stall at low RPM or at the stop. Obdii error code p0302. Dealership said cylinder 2 had little to no compression and needed repair. Could barely limp vehicle to dealership and smell the unburned fuel being ported out of the exhaust.”

   NHTSA complaint #11221514, filed 2019-06, 11,000 miles
4. 4
   Electrical system

   Intermittent no-start and electrical faults

   • 30 complaints (19%)
   • median 11,000 mi at 2.5 yrs old (7 state mileage, few)
   • 3 mention a crash, fire or injury
   • filed 2019–2026

   Owners describe the car failing to start in the morning despite repeated attempts, sometimes with a hard brake pedal, and dealers unable to reproduce the problem. Other complaints mention multiple warning lights, messages about the hybrid or engine system, and loss of power steering or braking assist; a service bulletin covering hard cold-weather starting describes inspecting and replacing the starter magnetic switch. Mixed: no-start reports come in the first few hundred miles, while multi-warning-light reports appear at higher mileage.

   4 related service bulletins

   What to check: Start the car from cold more than once during a test drive, check that all warning lights behave normally on startup, and ask whether the anti-theft software and ignition cylinder updates have been applied.

   2 excerpts from owner complaints in NHTSA records

   “I purchased this vehicle brand new with only 18 actual miles on the car around 6/14/19. During a call to dealership customer service call I was advised there was a software update that needed to be completed (service campaign 953 - ECM & cluster update-engine monitoring logic product improvement). Service was completed within 4-5 days before service campaign was closed. Within one week later was driving vehicle and bell went off and displayed two message on the instrument cluster. …”

   NHTSA complaint #11286608, filed 2019-12, 7,600 miles

   “Everything was displayed in red on the front screen, it was automatically parked, and the steering wheel did not move. This happened late March/02/2024 last Saturday night, so I called AAA twice and had them toward to my house. March/04/2024 I called AAA on Monday and had my car toward to hyundai service. They gave me a $199.95 bill for finding the problem with my car. And they said they would contact me and let me know about the problem with my car in 3~4 days. I am an Uber driver, but I am currently unable to work because I don't have a car.”

   NHTSA complaint #11576029, filed 2024-03, 153,400 miles

Buying note. Have any candidate car inspected for oil consumption and engine noise, and ask for service records showing oil consumption tests and completed service campaigns. Check the low-beam headlight pattern after dark and look for paint bubbling, since owners report both on otherwise low-mileage cars.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.