2018 Hyundai Sonata: Is It Reliable?
Problems, Recalls & Buyer Verdict
Shopping for a used 2018 Hyundai Sonata? This page highlights owner-reported complaint patterns and recall history so you can inspect the right systems before buying. Current data includes 354 complaints, with Engine Problems as the top reported area.
2018 Hyundai Sonata Fuel Economy
β EPA Official DataEPA-rated energy efficiency for the 2018 Hyundai Sonata. Values shown in MPGe (miles per gallon equivalent).
Source: EPA FuelEconomy.gov. Figures reflect EPA lab testing; real-world results vary by driving style, load, and conditions. 6 trims analysed.
2018 Hyundai Sonata Safety Ratings
NHTSA 5-Star ProgramOfficial crash test results from the NHTSA 5-Star Safety Ratings program. Stars reflect government-conducted tests; higher is safer.
Overall
10.5% rollover risk
Frontal Crash
Side Crash
Rollover
10.5% probability
Source: NHTSA 5-Star Safety Ratings. Ratings are based on government crash tests and may not reflect all trim levels.
Based on NHTSA complaint data, the 2018 Hyundai Sonata has 354 owner complaints, 18 crash-related complaints, and 1 recall campaign on record. The most frequently reported component is Engine Problems. NHTSA reliability signal: Severe Issues.
- Make
- Hyundai
- Model
- Sonata
- Model year
- 2018
- NHTSA owner complaints
- 354
- Crash-related complaints
- 18
- Safety recall campaigns
- 1
- Top reported component
- Engine Problems
- Reliability signal
- Severe Issues
- EPA MPGe combined
- 39
- EPA MPGe city / highway
- 37 / 42
- Fuel type
- Regular Gasoline
- Electric range (miles)
- 600
- NHTSA overall safety rating
- 5/5 stars
- NHTSA frontal crash rating
- 5/5 stars
- NHTSA side crash rating
- 5/5 stars
- NHTSA rollover rating
- 4/5 stars
- Electronic stability control
- Standard
Most Common 2018 Hyundai Sonata Problems
Top owner-reported complaint areas and where they often appear.
Engine Problems
Electrical Faults
Uncategorized Issues
Complaint patterns center on Engine Problems, Electrical Faults, Uncategorized Issues. Use these as a pre-purchase inspection guide, then verify recall and damage history on the specific VIN.
Should You Buy a Used 2018 Hyundai Sonata?
The 2018 Hyundai Sonata shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase.
Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report.
What to Check Before Buying a Used 2018 Hyundai Sonata
Inspection Focus
- Pre-purchase inspection should focus on engine condition and check for any known engine issues.
- Verify all open recalls at nhtsa.gov/recalls.
- Request service records for reported components, especially engine and electrical systems.
- Have a mechanic inspect the vehicle before purchase, paying attention to transmission and drivetrain.
Before You Close the Deal
- Pre-purchase inspection should focus on engine condition and check for any known engine issues.
- Verify all open recalls at nhtsa.gov/recalls.
- Request service records for reported components, especially engine and electrical systems.
- Have a mechanic inspect the vehicle before purchase, paying attention to transmission and drivetrain.
Shortlist with model-year data. Decide with the exact VIN.
Before buying a used 2018 Hyundai Sonata, run a VIN history report to verify accidents, title brands, odometer records, theft checks, and open recalls for the exact vehicle.
What the Complaint Data Suggests
Editorial interpretation of NHTSA public complaint data. Source: nhtsa.gov. Complaints are owner-submitted and do not confirm a defect. Methodology
Based on 354 NHTSA complaints for the 2018 Hyundai Sonata, the data suggests that engine problems are the most frequently reported issue, followed by electrical faults. There is also a notable number of complaints related to transmission/drivetrain and fuel/propulsion system issues. However, due to the low confidence level and the nature of consumer-submitted data, these patterns should be interpreted cautiously.
- Engine problems account for the largest share of complaints (211 out of 354).
- Electrical faults are the second most common complaint category (60 complaints).
- There are 18 crash-related complaints, though the severity is not specified.
- Engine Problems
- Electrical Faults
- Transmission / Drivetrain
All 2018 Hyundai Sonata Complaints by Category
Every owner-reported complaint category filed with NHTSA for the 2018 Hyundai Sonata. Use this as a pre-purchase inspection checklist.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Engine Problems | 211 | 3 | 7 | β | |
| Electrical Faults | 60 | 3 | 4 | β | |
| Uncategorized Issues | 57 | 1 | 2 | β | |
| Transmission / Drivetrain | 35 | 2 | 1 | β | |
| Fuel/Propulsion System | 27 | β | 1 | β | |
| Headlight/Taillight Failures | 22 | β | β | β | |
| Unintended Acceleration | 19 | 6 | β | β | |
| Brake System | 17 | 6 | 1 | β | |
| Structural Problems | 15 | β | β | β | |
| Steering Defects | 9 | β | β | β | |
| Door Lock Issues | 8 | β | β | β | |
| Seat Belt Issues | 8 | 2 | β | β | |
| Forward Collision Avoidance: AEB | 7 | 1 | β | β | |
| Visibility/Wiper | 5 | β | β | β | |
| Airbag Malfunctions | 4 | 2 | β | β | |
| Suspension Failures | 4 | β | β | β | |
| Tire Issues | 4 | β | β | β | |
| Hydraulic | 3 | 2 | β | β | |
| Lane Departure | 3 | β | β | β | |
| Seat-Related Issues | 2 | β | β | β | |
| Electronic Stability Control (Esc) | 2 | β | 1 | β | |
| Fuel System | 1 | β | β | β | |
| Gasoline | 1 | β | β | β | |
| Back Over Prevention | 1 | β | β | β | |
| Visibility | 1 | β | β | β | |
| Firerelated | 1 | β | 1 | β |
Source: NHTSA Complaints Database. Complaint counts may exceed total complaints because one report can span multiple categories.
Real Owner Complaints
Read what owners actually reported to NHTSA for the 2018 Hyundai Sonata. Type a keyword (e.g. βtransmissionβ, βstallingβ, βbrakesβ) to filter.
The trunk latch on the Hyundai Sonata malfunctioned, and our safety was put at risk when the trunk malfunctioned while driving on the freeway, obstructing the back view. After several attempts to try to close the trunk and after doing some research, I learned it had a vehicle recβ¦
Throttle response intermittent problem no acceleration since new. No codes available. When entering traffic engine stall factor flat spot. Been to dealer many times (Bud Clary) and just recently (04/26) confirmed the fuel pump is the problem. Unable to confirm because of no "codeβ¦
We think thereβs an issue with the abs module and wheel speed sensor because we started having a problem where the brakes wouldnβt work or would stutter. The car would shake real bad it would make an awful grinding sound but normally only when trying to stop at higher speeds or lβ¦
Had an oil change, then 2 weeks later car making noise, checked the oil and it was completely empty, so we refilled the oil. Then a month after again same issue no oil, refilled it again and now a week later it's 2 quarts low already. Also when I come to a complete stop when it iβ¦
I bought a 2018 Hyundai Sonata a few years back. No warranty. Used. 110,000 miles. A few short months after I purchased it, it stopped working. I took it back to the same dealership where I purchased it and they said they had to replace the coil packs and spark plugs and clean soβ¦
The vehicle developed a progressive engine failure beginning in early 2024, including loud knocking noises at cold start and visible white/gray/black exhaust smoke. The condition worsened over time. In February 2026, the failure escalated to active oil discharge from the exhaust β¦
The vehicle had safety and mechanical problems shortly after purchase, even with low mileage. The issues included warning lights, abnormal noises, repeated mechanical failures, and poor performance that affected the safe operation of the vehicle. These problems started early and β¦
2018 Hyundai Sonata 2.4L Theta II engine experiencing severe oil consumption and loss of oil pressure. Oil pressure warning light actively blinking and dipstick completely dry. This is consistent with the known Theta II engine defect subject to prior NHTSA investigations and clasβ¦
Excessive Oil Burning and Oil Consumption. Oil turns black abnormally quickly (within the first 500-1000 miles) even though recommended Full-Synthetic Oil is used. Engine has intermittent rough idle once engine is warm. Occasionally engine experiences "near-stall" and "misfire evβ¦
The component involved is the engine (2.4L Theta II gasoline engine) in my 2018 Hyundai Sonata. The malfunction involves excessive internal engine oil consumption between oil changes. The vehicle consumes oil at an abnormal rate, requiring frequent top-offs to prevent low oil levβ¦
The oil pan is starting to crack, a small drip is now happening but dealership says it could spilt and cause the engine to seize while driving. The pan looks very flimsy compared to my Ford and Toyota.
To Whom It May Concern, My name is [XXX] , and I am formally escalating serious ongoing issues with my 2018 Hyundai Sonata. Despite repeated attempts to resolve these concerns through the dealership, my vehicle continues to experience excessive oil consumption, engine failures, aβ¦
While driving the vehicle, I repeatedly must check and put oil in. (On average once per week) I took the car to an auto shop where I was told that the engine was bad and I must get a new one. I kept driving, putting oil in as needed, then the car in the middle of driving started β¦
Unknown what system failed. The vehicle is at an impound lot and can be inspected on request. Police and fire department were on the scene. Police did provide a report # , and fire department provided a fire rescue case number. Safety of driver was put at risk due to the fire andβ¦
The three airbags in the car (on the driver's weel, driver's knee, and the passenger's side) deployed while driving on a normal street at a speed of 50 miles/hour. This is an unexpected behavior of a car at a normal speed. I need help to fix this car and know what is the reasβ¦
The contact owns a 2018 Hyundai Sonata. The contact stated that while driving approximately 60 MPH, the vehicle started to vibrate roughly. The contact felt the vibration in the steering wheel. The check engine warning light was illuminated. The contact slowed down and pulled offβ¦
Engine oil consumption issues. My 2018 Hyundai Elantra falls within the dates of this issue. I had an oil consumption issue done and the dealership claimed it passed. I have to put oil in my car every 3 weeks and change spark plugs at the same time because of engine leaking β¦
Intermittent no-crank, no-start condition. Dash lights illuminate, push-button start produces no response. Brake pedal applied. Vehicle becomes immobilized without warning. Iβve been stranded on multiple occasions. Unable to commute to work, or home. Most recently on December 19,β¦
The contact owns a 2018 Hyundai Sonata. The contact stated that while receiving an oil change, the technician advised that the oil level was very low. The contact stated that the low oil warning was intermittently illuminated. The contact was advised to take the vehicle to a dealβ¦
Excessive oil consumption. I am routinely getting notifications of low oil about 1,000 miles before the oil change is due. When I bring it in for an oil change it is nearly empty. No signs of leaks anywhere.
Source: NHTSA Complaints Database. Real owner reports for the 2018 Hyundai Sonata.
2018 Hyundai Sonata Recalls
1 campaignNHTSA recall campaigns for the 2018 Hyundai Sonata. 1 recall campaign is on record for this model year. Recalls are free to fix at authorized dealers, but completion status must be verified on the exact VIN.
2018 Hyundai Sonata Buying FAQ
Buyer-focused answers based on real NHTSA complaint and recall data for this model year.
Is the 2018 Hyundai Sonata reliable?βΎ
Severe Issues. NHTSA currently shows 354 owner complaints, 18 crash-related complaints, and 1 recall campaign for this model year. The 2018 Hyundai Sonata shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase. Treat this as a model-year signal, then verify the exact vehicle's condition and history before purchase.
What are the most common problems with the 2018 Hyundai Sonata?βΎ
#1: Engine Problems (211 complaints). #2: Electrical Faults (60 complaints). #3: Uncategorized Issues (57 complaints)
At what mileage do problems start on the 2018 Hyundai Sonata?βΎ
Mileage data is not available or insufficient for this model year.
How safe is the 2018 Hyundai Sonata?βΎ
Complaint data is not the same as crash-test scoring, but it does highlight possible risk patterns. For the 2018 Hyundai Sonata, NHTSA complaints include 18 crash-related reports and 12 fire reports out of 354 total complaints. 20 injury reports are also on file. For controlled crash-test ratings, check nhtsa.gov/ratings.
Does the 2018 Hyundai Sonata have any recalls?βΎ
Yes. 1 NHTSA recall campaign affect the 2018 Hyundai Sonata. A major recall area is LATCHES/LOCKS/LINKAGES:TRUNK LID:LATCH. 1 recall campaign is on record for this model year. Always verify open recalls by VIN because completion status varies by vehicle.
Should I buy a 2018 Hyundai Sonata?βΎ
The 2018 Hyundai Sonata shows higher complaint activity for its model-year profile, so buyers should inspect known problem areas carefully before purchase. Use the model-year trend to shortlist candidates, then confirm the exact vehicle condition with service records, recall status, and a VIN history report. Pay extra attention to Engine Problems during inspection. Before committing, run a VIN history report to verify accidents, title brands, odometer records, and recall completion for the exact car.
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinSpector AI.
Wider context: See the full Hyundai Sonata reliability report with year-by-year comparison.
Owner Reliability Rating
Rate the 2018 Hyundai Sonata based on your ownership experience.
Add your rating:
Ratings are based on owner experience and are separate from NHTSA data shown above.
Check the Exact Vehicle History Before You Buy
Model-year complaints and recalls reveal patterns. A VIN report confirms whether the exact car has accident history, title brands, mileage issues, or open recalls.