2018 Hyundai Sonata Engine Problems

NHTSA component category: ENGINE · data through 07/12/2026

205Engine complaints

56.3%Of all 364 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

ENGINE205 · 56.3%

Unspecified / other58 · 15.9%

ELECTRICAL SYSTEM56 · 15.4%

POWER TRAIN39 · 10.7%

FUEL/PROPULSION SYSTEM30 · 8.2%

Share of the 364 complaints citing each category; one complaint can cite several. Full breakdown on the 2018 Hyundai Sonata overview page.

What owners report

“The contact owns a 2018 Hyundai Sonata. The contact stated while driving 55 mph, the check engine warning light illuminated. The contact stated that the…”NHTSA complaint 11425614 — filed 07/20/2021

“6/5/21 2018 Hyundai Sonata - less than 20K miles Turning left into parking lot at very low speed Car completely lost all power and brakes…”NHTSA complaint 11419752 — filed 06/05/2021

“THE OIL CONSUMPTION IS OUT OF CONTROL FOR THEIR VEHICLES I'VE HAD MORE OIL CHANGES THAT I'VE EVER DONE ON A VEHICLE I'VE DONE OIL…”NHTSA complaint 11414402 — filed 04/29/2021

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

Engine complaints by year filed

Frequently asked questions

Does the 2018 Hyundai Sonata have engine problems?

Engine is the most-reported problem area on the 2018 Hyundai Sonata: 205 of 364 complaints on file (56.3%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2018 Hyundai Sonata have in total?

364 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 18 involved a crash, 13 involved a fire, 20 reported injuries, and 1 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 07/12/2026.