2.8

hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
50,236 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2018 Hyundai Sonata engine problems

engine problem

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2018 Hyundai Sonata Owner Comments

problem #4

Mar 252025

Sonata

  • 57,000 miles

A D V E R T I S E M E N T S

The contact owns a 2018 Hyundai Sonata. The contact stated that the vehicle needed multiple attempts in order to start. The contact stated that once the vehicle was started, she noticed that the low engine oil pressure light was illuminated. The vehicle was taken to a local dealer, where it was determined that an oil consumption test needed to be completed. The vehicle was not repaired. The contact had stated that prior to the oil test being recommended, she had observed that the vehicle was consuming approximately five quarts of oil per 2,000 miles. The manufacturer was notified of the failure. The failure mileage was approximately 57,000.

- Louisville, KY, USA

problem #3

Nov 182024

Sonata

  • miles
See attached document for complaint.

- Chicago, IL, USA

problem #2

Jan 122024

Sonata

  • 120,000 miles
The contact owns a 2018 Hyundai Sonata. The contact stated while driving at approximately 70 MPH, the check engine warning illuminated. The contact stated that the vehicle was losing forward momentum. The contact depressed the accelerator pedal but the vehicle was still losing forward momentum and then stalled. The contact stated that he was able to coast to the side of the road. The contact attempted to restart the vehicle but was unable after several attempts. The vehicle was towed to a local dealer who diagnosed the vehicle and determined that the engine needed to be replaced due to a hole in the valve. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 120,000.

- Hickory Flat, MS, USA

problem #1

Apr 022018

Sonata

  • 23,944 miles
The contact owns a 2018 Hyundai Sonata. The contact stated the vehicle had failed to start. On other occasions while driving at various speeds, the vehicle was not running correctly, bucking, lost motive power and stalled. Additionally, the door and trunk failed to lock securely. There were no warning lights illuminated. A signal was sent to the vehicle however, the vehicle failed to respond. The vehicle was towed to the local dealer but the vehicle was not diagnosed or repaired. The vehicle was then towed to an independent mechanic who informed the contact that the fuel pump failed and caused the starter to burn out and drain the battery. The manufacturer was notified of the failure and provided a case number and referred the contact to the local dealer for assistance. The approximate failure mileage was 23,944.

- Dunedin, FL, USA

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