2015 Hyundai Sonata Hybrid: common problems

Owners of the 2015 Hyundai Sonata Hybrid filed 54 complaints with NHTSA, most often about electrical system and engine. Details by component below, with sources.

Key figures

Owner complaints: 54
involving a crash: 4

What fails most often

1 Electrical system 44% of all complaints
2 Engine 35% of all complaints
3 Service brakes 26% of all complaints
4 Powertrain 13% of all complaints
5 Vehicle speed control 7% of all complaints
6 Engine and cooling 4% of all complaints
7 Fuel/propulsion system 4% of all complaints
8 Hybrid propulsion system 4% of all complaints

Circle size and colour show each component’s share of NHTSA complaints. Schematic only, not a drawing of the exact model.

Electrical system: 24 complaints (44% of all), 2 of them with a crash reported by the owner.
Engine: 19 complaints (35% of all).
Service brakes: 14 complaints (26% of all), 1 of them with a crash reported by the owner.
Powertrain: 7 complaints (13% of all), 1 of them with a crash reported by the owner.
Vehicle speed control: 4 complaints (7% of all), 1 of them with a crash reported by the owner.

Symptoms owners describe

How many of the 54 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).

warning lights, check engine18 · 33%
stalls while driving11 · 20%
smoke, burning smell, fire5 · 9%
brake failure3 · 6%
knocking, grinding or other noise3 · 6%
A/C or heater2 · 4%
hesitation when accelerating2 · 4%
won't start2 · 4%
overheating, coolant loss2 · 4%
loss of power / limp mode2 · 4%

Components owners complain about

Component	Owner complaints	involving a crash
Electrical system	24	2
Engine	19	0
Service brakes	14	1
Powertrain	7	1
Vehicle speed control	4	1
Engine and cooling	2	0
Fuel/propulsion system	2	0
Hybrid propulsion system	2	1
Suspension	2	0
Air bags	1	1
Electronic stability control	1	0
Seat belts	1	1
Steering	1	0
Structure	1	1

What owners report

Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.

I went to pull in the parking spot.I went to put the car into park and it had no brakes. I was slamming them and pumping them. It excellerated and took off. Jumped the curb,went down the hill and into the apartment building. A red light had came on the dash, right before it took off.
Electrical system · crash · 2026-02-12 · NHTSA complaint #11717654
The contact stated that while driving at 55 mph, the vehicle stalled as the "hybrid system warning, safely stop and do not drive" warning message appeared on the instrument panel.
Electrical system · crash · 2021-01-12 · NHTSA complaint #11387774
The contacted stated that the front seat passenger sustained injuries to the left shoulder, neck and back which required medical attention due to the seat belt retracting too tight. The driver also sustained injuries to his neck and back which also needed medical attention.
Powertrain · crash · 2017-05-31 · NHTSA complaint #10992400
On sat, oct 1, at about 1 pm I was about to complete parking the vehicle in the parking lot of the huntington beach branch of chase bank. I fortunately selected a site on front of a planter section with bushes, as otherwise there could have been injuries or property damage.
Vehicle speed control · crash · 2016-10-18 · NHTSA complaint #10916773
Later, while attempting to accelerate from a yield sign, the vehicle suddenly stalled. The vehicle was later towed to the local dealer to be diagnosed, and it was determined that the engine bearings had failed and the engine needed to be replaced. The manufacturer was notified of the failure.
Engine · 2026-09-21 · NHTSA complaint #11765767
The contact stated that while the vehicle owner was driving 55 MPH, the owner noticed smoke coming from under the hood. The owner parked and exited the vehicle, and while attempting to inspect the vehicle, the owner noticed flames coming from underneath the hood, and the fire extended to the cabin of the vehicle.
Electrical system · 2026-09-15 · NHTSA complaint #11764359
The contact stated that while driving 5 MPH and making a left turn, the vehicle made an abnormal knocking sound. The contact stated that upon pulling into an apartment complex parking lot, the contact noticed that there was smoke coming out from underneath the hood. There was no warning light illuminated.
Service brakes · 2025-04-10 · NHTSA complaint #11653864
The contact stated while driving 45 MPH, the vehicle started overheating, and smelled an abnormal electrical burning odor inside the cabin. Several unknown warning lights were illuminated. The contact veered to the side of the road, turned off the vehicle and inspected under the hood.
Service brakes · 2024-04-22 · NHTSA complaint #11584561

When owners complained

NHTSA complaints by filing year. The peak shows at what age the problems show up most.

20154
20166
20178
20189
20195
20213
20222
20234
20245
20251
20267

Comparison

By complaint count this model year ranks 5,128 of 36,656 model years in the NHTSA data (top 14% most complained about).

On average one model year of the Sonata Hybrid has 50 complaints (16 years in the data). This year has 54, about average.

What to check before buying

Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Engine. Cold start, unusual noises, oil leaks and engine codes.
Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.

Other years of this model

Questions and answers

What are the most common problems with the 2015 Hyundai Sonata Hybrid?

Owner complaints to NHTSA most often mention: electrical system, engine, service brakes. Total complaints: 54. The most frequent symptoms in complaint texts: warning lights, check engine (33%), stalls while driving (20%), smoke, burning smell, fire (9%).

How many service bulletins (TSB) were issued for the 2015 Hyundai Sonata Hybrid?

NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.

Should I buy a 2015 Hyundai Sonata Hybrid from a US auction?

Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.

Other 2015 models

Read also

Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.