2015 Hyundai Sonata Engine Problems
- Complaints
- 629about this part
- Share
- 55%of 1,153 total for the year
- Median mileage
- 65,000miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 629 complaints about the engine of the 2015 Hyundai Sonata, 55% of the 1,153 complaints for this model year. Where a mileage was given, the median is 65,000 miles. 4 of these say a crash was involved and 35 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was driving to work at like 4:00 in the morning it was still dark outside the light turned green and as I hit the gas pedal the car stall it was moving slow so on my right hand side there was a building so I try to make it to the parking lot the car started to power down in a knocking noise started it was a busy morning in the morning work traffic”
NHTSA complaint #11415669, filed 2021-05, 10 miles“I was driving to work I got about 5 minutes away from job the light ahead turned yellow I went to ease on the brake preparing to stop my steering wheel locked car car shut off and wouldnt start like I said I was 4 minutes away from my job so I managed to get it there I checked all fluids they were fine however when I did open the hood it was smoking from my engine”
NHTSA complaint #11415754, filed 2021-05, 65,000 miles“The car stalled while on the road while driving to leave san antonio. The car left in san antonio to be fixed for 30 days. Returned to san antonio Hyundai replaced the engine due to a faulty engine. Metal flakes found inside engine. I am now being told I need a transmission less than 1 month after the engine replacement. Hyundai not honoring their powertrain warranty.”
NHTSA complaint #11408045, filed 2021-04, 82,985 miles“Engine oil consumption: more than 1 quarter every 1,000 miles but the mechanic did not find any leaking. The vehicle has total 55,000 miles and I drive about 1000 miles/month on freeway and local streets. I also found many reports on the websites and many Hyundai dealers had tested the oil consumption and waiting to the response from Hyundai headquarters.”
NHTSA complaint #11322288, filed 2020-04, 50,000 miles“Vehicle is going through engine oil very quickly. No evidence of a leak, no evidence of burning. Oil light does not illuminate when oil is low. When I checked this morning, my oil level didn't register on the dipstick - but no warning light came on. I was only 100 miles over my scheduled oil change. Last checked 2 weeks ago and was fine.”
NHTSA complaint #11339321, filed 2020-07, 80,002 milesRelated service bulletins
- 11038458Oct 8, 2026Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin outlines the combustion chamber cleaning procedure…
- 11038456Oct 7, 2026Certain vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin provides the inspection and repair procedures…
- 11033700May 21, 2026Certain Santa Fe (TMA), Santa Fe Sport (AN), Sonata (LFA), and Tucson (TL) vehicles equipped with Theta II engines may exhibit elevated engine-out emissions. The California Air…
- 11033699May 21, 2026Certain Santa Fe (TMA), Santa Fe Sport (AN), Sonata (LFA), and Tucson (TL) vehicles equipped with Theta II engines may exhibit elevated engine-out emissions. This bulletin…
- 11033705May 19, 2026Following completion of Service Campaign 9C2 (Theta II Emissions Improvement), certain vehicles may exhibit a brief hesitation or rough shifting condition during cold start…
- 11033701May 19, 2026Following completion of Service Campaign 9C2 (Theta II Emissions Improvement), certain vehicles may exhibit a brief hesitation or rough shifting condition during cold start…
- 11031400Apr 18, 2026Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter magnetic switch for potential freezing…
- 11031416Apr 14, 2026Certain 2019 – 2020 model year Santa Fe, 2017 – 2018 model year Santa Fe Sport, 2015 – 2019 model year Sonata, and 2018 – 2021 model year Tucson vehicles may exhibit elevated…
- 11030625Mar 30, 2026Hyundai Motor America is currently investigating an ongoing issue with software GDS event #1383 related to 2015MY Sonata (LFA) 2.4L vehicles. The matter is currently being…
- 11030619Mar 30, 2026Hyundai Motor America is currently investigating an ongoing issue with software GDS event #1383 related to 2015MY Sonata (LFA) 2.4L vehicles. The matter is currently being…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 2 | 12% |
| 2024 | 3 | 6% |
| 2023 | 28 | 32% |
| 2022 | 25 | 26% |
| 2021 | 34 | 25% |
| 2020 | 32 | 18% |
| 2019 | 87 | 54% |
| 2018 | 212 | 57% |
| 2017 | 385 | 50% |
| 2016 | 452 | 62% |
| 2015 | 629 | 55% |
| 2014 | 303 | 40% |
| 2013 | 739 | 39% |
| 2012 | 567 | 36% |
| 2011 | 968 | 29% |
| 2010 | 29 | 8% |
| 2009 | 56 | 12% |
| 2008 | 48 | 11% |
| 2007 | 41 | 6% |
| 2006 | 44 | 4% |
| 2005 | 6 | 4% |
| 2004 | 5 | 2% |
| 2003 | 3 | 2% |
| 2002 | 5 | 2% |
| 2001 | 1 | 0% |
Other parts of the 2015 Hyundai Sonata
169 complaintsElectrical system
167 complaintsTransmission and drivetrain
135 complaintsFuel system
86 complaintsBrakes
79 complaintsSteering
74 complaintsVehicle speed control
61 complaintsBody and structure
52 complaintsExterior lighting
38 complaintsVisibility (wipers, defrost, mirrors)
30 complaintsAir bags
25 complaintsEngine cooling
21 complaints
← All problems reported for the 2015 Hyundai Sonata
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology