2015 Hyundai Sonata Engine Problems

NHTSA component category: ENGINE · data through 07/14/2026

612Engine complaints

54.3%Of all 1,127 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How engine ranks on this vehicle

ENGINE612 · 54.3%

Unspecified / other161 · 14.3%

ELECTRICAL SYSTEM159 · 14.1%

POWER TRAIN133 · 11.8%

STEERING72 · 6.4%

Share of the 1,127 complaints citing each category; one complaint can cite several. Full breakdown on the 2015 Hyundai Sonata overview page.

What owners report

“SHORTLY AFTER EXITING INTERSTATE AND SLOWDOWN FOR SIGNAL, I ATTEMPTED TO ACCELERATE AND THE VEHICLE WAS TOTALLY UNRESPONSIVE, LIKE I WASN'T EVEN GIVING IT GAS…”NHTSA complaint 10928165 — filed 11/27/2016

“I GOT MY CAR WITH 15 MILES ON IT, BEFORE I EVEN HAD 10 THOUSAND MILES THE CAR HAD A TRANSMISSION HEAT UP. TOOK IT…”NHTSA complaint 10919186 — filed 10/26/2016

“THE CAR AT ABOUT 7K MILES STARTED USING OIL A QT, EVERY 2500 MI. THEY ARE TELLING ME IT IS NORMAL . IT IS POLLUTING…”NHTSA complaint 10919132 — filed 10/26/2016

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Engine complaints by year filed

Frequently asked questions

Does the 2015 Hyundai Sonata have engine problems?

Engine is the most-reported problem area on the 2015 Hyundai Sonata: 612 of 1,127 complaints on file (54.3%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2015 Hyundai Sonata have in total?

1,127 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 34 involved a crash, 47 involved a fire, 32 reported injuries, and 2 reported deaths.

What does NHTSA's engine category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/14/2026.